[automerger] Fix OOB access in Tremolo am: bc5c9c3a40 am: a709728a6f am: add22ecca3 am: 73dbe46cca am: aa028a5188

Change-Id: I47fc2dc2b6ff88cd689e5bcf76af7970808879a0
diff --git a/Android.mk b/Android.mk
index 1fb89e0..6bc8514 100644
--- a/Android.mk
+++ b/Android.mk
@@ -32,7 +32,7 @@
 LOCAL_CFLAGS_x86 += -DONLY_C
 LOCAL_CFLAGS_x86_64 += -DONLY_C
 
-LOCAL_CFLAGS+= -O2 -funsigned-char
+LOCAL_CFLAGS += -O2 -D_GNU_SOURCE -funsigned-char
 
 LOCAL_C_INCLUDES:= \
 	$(LOCAL_PATH)/Tremolo