[cmake] Always put test/api/CMakeLists.txt on distributions

test/api/Makefile.am

@@ -10,11 +10,12 @@ MAINTAINERCLEANFILES =
 lib:
 	@$(MAKE) $(AM_MAKEFLAGS) -C $(top_builddir)/src lib
 
+EXTRA_DIST += CMakeLists.txt
+
 if HAVE_GLIB
 AM_CPPFLAGS = -DSRCDIR="\"$(srcdir)\"" -I$(top_srcdir)/src/ -I$(top_builddir)/src/ $(GLIB_CFLAGS)
 LDADD = $(top_builddir)/src/libharfbuzz.la $(GLIB_LIBS)
 
-EXTRA_DIST += CMakeLists.txt
 EXTRA_DIST += hb-test.h
 
 check_PROGRAMS = $(TEST_PROGS)