tests: use 'check_PROGRAMS' instead of 'noinst_PROGRAMS'

When using 'check_PROGRAMS', autoconf/automake generates smarter
Makefiles, so that the test programs are not being compiled during
the normal 'make all', but only during 'make check'.

Change-Id: I9b60429c8c3922dd97809c72ed7960ffdc059d8b

tests/smlc_subscr/Makefile.am

@@ -20,7 +20,7 @@ EXTRA_DIST = \
 	smlc_subscr_test.err \
 	$(NULL)
 
-noinst_PROGRAMS = \
+check_PROGRAMS = \
 	smlc_subscr_test \
 	$(NULL)