Support native test prebuilts for X86+ARM builds

This allows Soong native tests to be built and installed on these
builds.

Bug: 32177952
Test: m -j bionic-unit-tests
Change-Id: Ifbe39ba7a8991cb87d10c5da679992cf3065444e
diff --git a/core/prebuilt.mk b/core/prebuilt.mk
index 5831e24..839e14f 100644
--- a/core/prebuilt.mk
+++ b/core/prebuilt.mk
@@ -15,7 +15,7 @@
 
   ifeq ($(TARGET_TRANSLATE_2ND_ARCH),true)
     # Only support prebuilt shared and static libraries for translated arch
-    ifeq ($(filter SHARED_LIBRARIES STATIC_LIBRARIES,$(LOCAL_MODULE_CLASS)),)
+    ifeq ($(filter SHARED_LIBRARIES STATIC_LIBRARIES NATIVE_TESTS,$(LOCAL_MODULE_CLASS)),)
       LOCAL_MULTILIB := first
     endif
   endif