[PATCH v2] selftests: x86: override clean in lib.mk to fix warnings

[Shuah Khan]

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

Makefile:44: 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>
---
Changes since v1:
- simplified to use EXTRA_CLEAN based on Michael Ellerman's comments.

 tools/testing/selftests/x86/Makefile | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile
index 38e0a9c..97f187e 100644
--- a/tools/testing/selftests/x86/Makefile
+++ b/tools/testing/selftests/x86/Makefile
@@ -40,8 +40,7 @@ all_32: $(BINARIES_32)
 
 all_64: $(BINARIES_64)
 
-clean:
-	$(RM) $(BINARIES_32) $(BINARIES_64)
+EXTRA_CLEAN := $(BINARIES_32) $(BINARIES_64)
 
 $(BINARIES_32): $(OUTPUT)/%_32: %.c
 	$(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl -lm
-- 
2.9.3