build 32- and 64-bit libs (auto-generated)

Change-Id: Iccb63cafc5db17abd423d589416d50ff21c89efa
diff --git a/tests/foo/1.0/Android.mk b/tests/foo/1.0/Android.mk
index 7a0de55..0758b3d 100644
--- a/tests/foo/1.0/Android.mk
+++ b/tests/foo/1.0/Android.mk
@@ -65,6 +65,7 @@
   libhwbinder \
   libutils \
 
+LOCAL_MULTILIB := both
 LOCAL_COMPATIBILITY_SUITE := vts
 -include test/vts/tools/build/Android.packaging_sharedlib.mk
 include $(BUILD_SHARED_LIBRARY)