Enable clang compilation.

Previous clang/llvm bug was fixed.

BUG: 18373866
Change-Id: I10888d0bc1cf8f621c719a705b1f77ff0d0ecca5
(cherry picked from commit 1ab4ff2355e934517751e40573e4163cb49b1676)
diff --git a/services/audioflinger/tests/Android.mk b/services/audioflinger/tests/Android.mk
index 536eb93..e152468 100644
--- a/services/audioflinger/tests/Android.mk
+++ b/services/audioflinger/tests/Android.mk
@@ -30,12 +30,6 @@
 #
 include $(CLEAR_VARS)
 
-# Clang++ aborts on AudioMixer.cpp,
-# b/18373866, "do not know how to split this operator."
-ifeq ($(filter $(TARGET_ARCH),arm arm64),$(TARGET_ARCH))
-    LOCAL_CLANG := false
-endif
-
 LOCAL_SRC_FILES:= \
 	test-mixer.cpp \
 	../AudioMixer.cpp.arm \