Disable clang++ due to compiler error.

Clang++ chokes on AudioMixer.cpp.
It does not know "how to split this operator."

BUG: 18373866
Change-Id: I3d588d44596c7c3b6f97e5f822545e015b074206
diff --git a/services/audioflinger/Android.mk b/services/audioflinger/Android.mk
index 697fb37..37971f3 100644
--- a/services/audioflinger/Android.mk
+++ b/services/audioflinger/Android.mk
@@ -23,6 +23,12 @@
 
 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:=               \
     AudioFlinger.cpp            \
     Threads.cpp                 \
diff --git a/services/audioflinger/tests/Android.mk b/services/audioflinger/tests/Android.mk
index 8935981..8604ef5 100644
--- a/services/audioflinger/tests/Android.mk
+++ b/services/audioflinger/tests/Android.mk
@@ -30,6 +30,12 @@
 #
 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 \