perf build: Add llvm/clang make targets to FILES

So they can follow the OUTPUT variable setup as the rest of the
features.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180307155020.32613-19-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/build/feature/Makefile

@@ -54,7 +54,10 @@ FILES=                                          \
          test-jvmti.bin				\
          test-sched_getcpu.bin			\
          test-setns.bin				\
-         test-libopencsd.bin
+         test-libopencsd.bin			\
+         test-clang.bin				\
+         test-llvm.bin				\
+         test-llvm-version.bin
 
 FILES := $(addprefix $(OUTPUT),$(FILES))