tests: don't treat helper scripts as though they were tests

We shouldn't install .test metadata for these, and run them as TAP
test scripts. In glib-tap.mk jargon that makes them "extra scripts".

Signed-off-by: Simon McVittie <smcv@debian.org>

Makefile.am

@@ -1,7 +1,7 @@
 NULL =
 
 bin_PROGRAMS = $(NULL)
-dist_installed_test_scripts = $(NULL)
+dist_installed_test_extra_scripts = $(NULL)
 noinst_PROGRAMS = $(NULL)
 noinst_LTLIBRARIES = $(NULL)
 libexec_PROGRAMS = $(NULL)

tests/Makefile.am.inc

@@ -59,7 +59,7 @@ tests/package_version.txt: Makefile
 
 tests/test-basic.sh: tests/package_version.txt
 
-dist_installed_test_scripts += \
+dist_installed_test_extra_scripts += \
 	buildutil/tap-driver.sh \
 	tests/test-configure \
 	tests/make-test-app.sh \