Enable stack-protector for x86

Change-Id: I7a169075ca49ab831c37625d416c1d4b026bfec3
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index f12ad3e..9a6e08e 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -94,6 +94,7 @@
 			-fstrict-aliasing \
 			-funswitch-loops \
 			-funwind-tables \
+			-fstack-protector \
 			-include $(call select-android-config-h,target_linux-x86)
 
 # XXX: Not sure this is still needed. Must check with our toolchains.