Ignore dummy output file

.cvsignore

@@ -1,22 +1 @@
-
-.cvsignore
-.ignore
-ID
-Makefile
-a
-b
-config.cache
-config.h
-config.log
-config.status
-dist.tar.gz
-rsync
-rsync-*
-rsync.aux
-rsync.dvi
-rsync.log
-tech_report.aux
-tech_report.dvi
-tech_report.log
-tech_report.ps
-test
+zlib/dummy