github: expect fake-super-backup-fifo-regression to skip on Cygwin

The fleet run for this change reported it as an unexpected skip there.
Cygwin has no real FIFO for fake-super to represent, so the test skips
by design; every other target runs it.

.github/workflows/cygwin-build.yml

@@ -47,7 +47,7 @@ jobs:
       # package installed above), verified on a real Cygwin host. The real
       # chown/devices tests still skip (need root/mknod), as do the
       # RESOLVE_BENEATH symlink-race tests.
-      run: bash -c 'RSYNC_EXPECT_SKIPPED=acl-symlink-race,acls,acls-default,acls-depth,acls-unpinnable,backup-acl-xattr-cache,backup-dir-symlink-race,basis-xname-traversal,batch-file-symlink,checksum-zero-blocklen,chown,chroot-alt-dest-inner-module,chroot-basis-forge-inner-module,chroot-copy-dest-inner-module,chroot-link-dest-inner-module,chroot-receiver-write-inner-module,chroot-special-inner-module,copy-dest-symlink-readleak,copy-xattrs-symlink-race,daemon-access-ip,daemon-argv-limit,daemon-auth-group,daemon-chroot,daemon-chroot-acl,daemon-chroot-munge-default,daemon-config-symlink,daemon-deny-dns-failopen,daemon-dot-file-force-wipe,daemon-http-proxy,daemon-max-alloc-zero,daemon-module-chdir-symlink,daemon-module-options,daemon-module-private-parent,daemon-namecvt-empty-response,daemon-namecvt-newline-token,daemon-proxy-protocol,daemon-secrets-file-symlink,daemon-standalone-detach,daemon-symlink-escape-matrix,devices,dir-sgid,early-input-symlink,exclude-implied-trailing-backslash,excludefrom-symlink,fake-super-acl-xattr,files-from-leak,filter-merge-symlink,inband-modname-leak,insecure-links-admin-optout,io-noop-flood-recursion,io-nosend-flood-recursion,io-readargs-argv-nullwrite,ki62-io-error-mask,log-file-symlink,malicious-dot-dir-delete-scope,malicious-dot-file-delete-scope,malicious-server-partial-basis-symlink-overwrite,match-append-empty-nullmap,match-want-i-nolen,msg-io-timeout-overflow,nondaemon-symlink-race,nonroot-restrictive-perms,open-noatime,operator-path-backup-rmdir,operator-path-backup-symlink,operator-path-insecure-links-daemon,partial-protected-regular-retry-linux,partial-protected-regular-retry-policy,password-file-symlink,peer-legacy-implied-delete-scope,protected-regular,proto-cleared-dirflist,proto-cleared-ndx,proto-hlink-flag-oob,proto-hlink-gnum,proto-msg-info-assert,proto-sender-selftest,proto-subflist-freed,proxy-connect-request-too-long,proxy-protocol-trusted-peer,proxy-response-header-too-long,proxy-response-line-too-long,recv-discard-nullderef,recv-generator-acl-leak,rename-mixed-parent-transfer,sender-remove-source-root-anchor,simd-checksum,source-change-size-continues,symlink-dest-backupdir,symlink-exclude-xattr,symlink-race-dest,symlink-race-relative-dest,temp-dir-symlink-injection,uidlist-id0-name-leak,variety-symlink-traversal,xattr-wire-cap,xrsync make check'
+      run: bash -c 'RSYNC_EXPECT_SKIPPED=acl-symlink-race,acls,acls-default,acls-depth,acls-unpinnable,backup-acl-xattr-cache,backup-dir-symlink-race,basis-xname-traversal,batch-file-symlink,checksum-zero-blocklen,chown,chroot-alt-dest-inner-module,chroot-basis-forge-inner-module,chroot-copy-dest-inner-module,chroot-link-dest-inner-module,chroot-receiver-write-inner-module,chroot-special-inner-module,copy-dest-symlink-readleak,copy-xattrs-symlink-race,daemon-access-ip,daemon-argv-limit,daemon-auth-group,daemon-chroot,daemon-chroot-acl,daemon-chroot-munge-default,daemon-config-symlink,daemon-deny-dns-failopen,daemon-dot-file-force-wipe,daemon-http-proxy,daemon-max-alloc-zero,daemon-module-chdir-symlink,daemon-module-options,daemon-module-private-parent,daemon-namecvt-empty-response,daemon-namecvt-newline-token,daemon-proxy-protocol,daemon-secrets-file-symlink,daemon-standalone-detach,daemon-symlink-escape-matrix,devices,dir-sgid,early-input-symlink,exclude-implied-trailing-backslash,excludefrom-symlink,fake-super-acl-xattr,fake-super-backup-fifo-regression,files-from-leak,filter-merge-symlink,inband-modname-leak,insecure-links-admin-optout,io-noop-flood-recursion,io-nosend-flood-recursion,io-readargs-argv-nullwrite,ki62-io-error-mask,log-file-symlink,malicious-dot-dir-delete-scope,malicious-dot-file-delete-scope,malicious-server-partial-basis-symlink-overwrite,match-append-empty-nullmap,match-want-i-nolen,msg-io-timeout-overflow,nondaemon-symlink-race,nonroot-restrictive-perms,open-noatime,operator-path-backup-rmdir,operator-path-backup-symlink,operator-path-insecure-links-daemon,partial-protected-regular-retry-linux,partial-protected-regular-retry-policy,password-file-symlink,peer-legacy-implied-delete-scope,protected-regular,proto-cleared-dirflist,proto-cleared-ndx,proto-hlink-flag-oob,proto-hlink-gnum,proto-msg-info-assert,proto-sender-selftest,proto-subflist-freed,proxy-connect-request-too-long,proxy-protocol-trusted-peer,proxy-response-header-too-long,proxy-response-line-too-long,recv-discard-nullderef,recv-generator-acl-leak,rename-mixed-parent-transfer,sender-remove-source-root-anchor,simd-checksum,source-change-size-continues,symlink-dest-backupdir,symlink-exclude-xattr,symlink-race-dest,symlink-race-relative-dest,temp-dir-symlink-injection,uidlist-id0-name-leak,variety-symlink-traversal,xattr-wire-cap,xrsync make check'
     - name: check (TCP daemon transport)
       # Second run with daemon tests over a real loopback rsyncd; the default
       # 'make check' above uses the secure stdio-pipe transport.