x86: set -msse2 for all builds

All supported x86 processors have SSE2.

Change-Id: Ib4a0511c456fe3185b0b902390860ad557aeedcf
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index baf4f3f..8959e64 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -125,6 +125,7 @@
 			-funwind-tables \
 			-fstack-protector \
 			-m32 \
+			-msse2 \
 			-include $(android_config_h) \
 			-I $(dir $(android_config_h))