Define TESTS variable

Signed-off-by: Tudor Florea <tudor.florea@enea.com>
Upstream-Status: Pending

diff -ruN a/Makefile.am b/Makefile.am
--- a/Makefile.am	2015-11-12 20:29:46.778396936 +0100
+++ b/Makefile.am	2015-11-12 20:32:24.342450279 +0100
@@ -48,7 +48,7 @@
 dist_bashcompletion_DATA =
 check_PROGRAMS =
 dist_check_SCRIPTS =
-TESTS =
+TESTS = $(check_PROGRAMS)
 
 PATHFILES =