tests: add valgrind supression for gbm bug

tests/Makefile.am

@@ -16,7 +16,8 @@ test_virgl_init_LDFLAGS = -no-install
 if HAVE_VALGRIND
 VALGRIND_FLAGS=--leak-check=full \
 	       --quiet \
-	       --error-exitcode=3
+	       --error-exitcode=3 \
+		--suppressions=$(srcdir)/valgrind.suppressions
 
 valgrind:
 	$(MAKE) check-TESTS LOG_COMPILER="$(VALGRIND)" LOG_FLAGS="$(VALGRIND_FLAGS)" CK_FORK=no

tests/valgrind.suppressions

@@ -0,0 +1,28 @@
+{
+   srunner_run::timer_create-uninitialized-bytes
+   Memcheck:Param
+   timer_create(evp)
+   fun:timer_create@@GLIBC_2.3.3
+   fun:srunner_run
+   fun:litest_run
+   fun:main
+}
+
+{
+   eglleak
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   obj:*
+   obj:*
+   obj:*
+   obj:*
+   obj:*
+   fun:dri_screen_create_dri2
+   fun:dri_device_create
+   fun:_gbm_create_device
+   fun:gbm_create_device
+   fun:virgl_egl_init
+   fun:virgl_renderer_init
+}
+