I got an error when compiling selftests/bpf:

libbpf.c:411:10: error: implicit declaration of function 'reallocarray';
did you mean 'realloc'? [-Werror=implicit-function-declaration]
  progs = reallocarray(progs, nr_progs + 1, sizeof(progs[0]));

It was caused by feature-reallocarray=1 in FEATURE-DUMP.libbpf and it
was fixed by manually removing feature/ folder. This diff adds feature/
to EXTRA_CLEAN to avoid this problem.

Signed-off-by: Hechao Li <hech...@fb.com>
---
 tools/testing/selftests/bpf/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/Makefile 
b/tools/testing/selftests/bpf/Makefile
index 2b426ae1cdc9..44fb61f4d502 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -279,4 +279,5 @@ $(OUTPUT)/verifier/tests.h: $(VERIFIER_TESTS_DIR) 
$(VERIFIER_TEST_FILES)
                 ) > $(VERIFIER_TESTS_H))
 
 EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(ALU32_BUILD_DIR) \
-       $(VERIFIER_TESTS_H) $(PROG_TESTS_H) $(MAP_TESTS_H)
+       $(VERIFIER_TESTS_H) $(PROG_TESTS_H) $(MAP_TESTS_H) \
+       feature
-- 
2.17.1

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