Build 32/64 bit versions of tests/benchmarks.

Change-Id: I4d146377aac6573a214dfaa5cab5cce8b10538b4
diff --git a/tests/Android.mk b/tests/Android.mk
index d2bcce8..daf9377 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -221,6 +221,7 @@
 
 module := bionic-unit-tests
 module_tag := optional
+multilib := both
 build_type := target
 build_target := NATIVE_TEST
 include $(LOCAL_PATH)/Android.build.mk
@@ -242,6 +243,7 @@
 
 module := bionic-unit-tests-static
 module_tag := optional
+multilib := both
 build_type := target
 build_target := NATIVE_TEST
 include $(LOCAL_PATH)/Android.build.mk