Bypass compilation errors due to compiler upgrade

Bypass CLANG compilation errors by adding ignore flags

Change-Id: I99317ca2ccf5ee953ca5796e01db63dd396d622d
diff --git a/post_proc/Android.mk b/post_proc/Android.mk
index 9c503a6..ef1685f 100644
--- a/post_proc/Android.mk
+++ b/post_proc/Android.mk
@@ -14,6 +14,7 @@
 LOCAL_CFLAGS += -Wno-unused-function
 LOCAL_CFLAGS += -Wno-unused-local-typedef
 LOCAL_CFLAGS += -Wno-format
+LOCAL_CFLAGS += -Wno-unused-value
 
 ifeq ($(strip $(AUDIO_FEATURE_ENABLED_PROXY_DEVICE)),true)
     LOCAL_CFLAGS += -DAFE_PROXY_ENABLED