x86: the -mbionic flag is needed for IA builds.

Change-Id: I00c75f37d7ea46b9f8ad3d7b2ff7094477ff0916
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index 6b4083d..449af83 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -89,6 +89,7 @@
     TARGET_GLOBAL_CFLAGS += -march=i686
 endif
 
+TARGET_GLOBAL_CFLAGS += -mbionic
 TARGET_GLOBAL_CFLAGS += -D__ANDROID__
 TARGET_GLOBAL_LDFLAGS += -m32