Fix mips build.

Change-Id: I5401ae6ca6553ebbec231166820c1c904355ec63
diff --git a/libcorkscrew/Android.mk b/libcorkscrew/Android.mk
index b5aa90b..8f3b68c 100644
--- a/libcorkscrew/Android.mk
+++ b/libcorkscrew/Android.mk
@@ -30,7 +30,7 @@
 	arch-x86/backtrace-x86.c \
 	arch-x86/ptrace-x86.c
 
-ifeq ($(TARGET_IS_64_BIT), false)
+ifneq ($(TARGET_IS_64_BIT),true)
 
 include $(CLEAR_VARS)