[PATCH v3 2/3] tools: adding clean target to user selftest

Gets rid of this error when running 'make clean' in the selftests
directory:

make[1]: Entering directory `.../tools/testing/selftests/user'
make[1]: *** No rule to make target `clean'.  Stop.

Signed-off-by: Peter Feiner <redacted>

---

v1 -> v2:
	Separated this from the parallel build patch.
v2 -> v3:
	Added Signed-off-by.
---
 tools/testing/selftests/user/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/user/Makefile b/tools/testing/selftests/user/Makefile
index 396255b..8eb6583 100644
--- a/tools/testing/selftests/user/Makefile
+++ b/tools/testing/selftests/user/Makefile

@@ -3,6 +3,8 @@
 # No binaries, but make sure arg-less "make" doesn't trigger "run_tests"
 all:
 
+clean:
+
 run_tests: all
 	@if /sbin/modprobe test_user_copy ; then \
 		rmmod test_user_copy; \

-- 
2.1.0.rc2.206.gedb03e5