Add library test makefile solutions.

Change-Id: Ibc8df9b0e2342683158936bf011425780df8f02a
diff --git a/core/static_test_lib.mk b/core/static_test_lib.mk
new file mode 100644
index 0000000..9d0bcc8
--- /dev/null
+++ b/core/static_test_lib.mk
@@ -0,0 +1,8 @@
+#############################################
+## A thin wrapper around BUILD_STATIC_LIBRARY
+## Common flags for native tests are added.
+#############################################
+
+include $(BUILD_SYSTEM)/target_test_internal.mk
+
+include $(BUILD_STATIC_LIBRARY)