Disable clang compilation due to lack of ifunc.

BUG: 18055309
Change-Id: I0f36011cf7872a20ddd36a6c3c607eb96f0a8ec2
diff --git a/tests/libs/Android.mk b/tests/libs/Android.mk
index eabc887..e4fee6a 100644
--- a/tests/libs/Android.mk
+++ b/tests/libs/Android.mk
@@ -276,6 +276,7 @@
     endif
 
     build_type := target
+    libtest_ifunc_clang_target := false
     include $(TEST_PATH)/Android.build.mk
 endif