external: stressapptest: don't build x86 targets

Fixes broken build aosp_x86-eng (linux) build in
git_master-without-vendor

Change-Id: I638ae3ab80dd2749073cd623fbe172d1c9f3acbd
diff --git a/Android.mk b/Android.mk
index 24e47e4..1f15d46 100644
--- a/Android.mk
+++ b/Android.mk
@@ -22,7 +22,7 @@
 LOCAL_MULTILIB := 32
 LOCAL_MODULE := stressapptest
 LOCAL_MODULE_TAGS := optional
-LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH := mips
+LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH := mips x86
 
 LOCAL_CFLAGS := -DHAVE_CONFIG_H -DANDROID -DNDEBUG -UDEBUG -DCHECKOPTS