[PATCH 7/8] selftests: sync: override clean in lib.mk to fix warnings

[Shuah Khan]

Add override for lib.mk clean to fix the following warnings from clean
target run.

Makefile:24: warning: overriding recipe for target 'clean'
../lib.mk:55: warning: ignoring old recipe for target 'clean'

Signed-off-by: Shuah Khan <shuahkh at osg.samsung.com>
---
 tools/testing/selftests/sync/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/sync/Makefile b/tools/testing/selftests/sync/Makefile
index 87ac400..f7d250d 100644
--- a/tools/testing/selftests/sync/Makefile
+++ b/tools/testing/selftests/sync/Makefile
@@ -20,5 +20,6 @@ TESTS += sync_stress_merge.o
 
 sync_test: $(OBJS) $(TESTS)
 
-clean:
+override define CLEAN
 	$(RM) sync_test $(OBJS) $(TESTS)
+endef
-- 
2.9.3