[PATCH 4/8] selftests: gpio: 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:11: warning: overriding recipe for target 'clean'
../lib.mk:55: warning: ignoring old recipe for target 'clean'

Signed-off-by: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
---
 tools/testing/selftests/gpio/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile
index 205e4d1..4f6d9e0 100644
--- a/tools/testing/selftests/gpio/Makefile
+++ b/tools/testing/selftests/gpio/Makefile
@@ -7,8 +7,9 @@ include ../lib.mk
 
 all: $(BINARIES)
 
-clean:
+override define CLEAN
 	$(RM) $(BINARIES)
+endef
 
 CFLAGS += -O2 -g -std=gnu99 -Wall -I../../../../usr/include/
 LDLIBS += -lmount -I/usr/include/libmount
-- 
2.9.3