Link libgtest_main before libgtest

libgtest_main uses symbols from libgtest.  If libgtest_main is linked
after libgtest, and the test .o files don't reference libgtest (which is
unlikely), then the libgtest .o files will be ignored and libgtest_main
won't be able to find its symbols from libgtest.

Change-Id: Ica3bc679bd9d14e9a3065be927f085cf52faab64
diff --git a/core/target_test_internal.mk b/core/target_test_internal.mk
index f8a9f04..4715fe8 100644
--- a/core/target_test_internal.mk
+++ b/core/target_test_internal.mk
@@ -7,9 +7,9 @@
 LOCAL_C_INCLUDES += external/gtest/include
 
 ifndef LOCAL_SDK_VERSION
-LOCAL_STATIC_LIBRARIES += libgtest libgtest_main
+LOCAL_STATIC_LIBRARIES += libgtest_main libgtest
 else
-LOCAL_STATIC_LIBRARIES += libgtest_ndk libgtest_main_ndk
+LOCAL_STATIC_LIBRARIES += libgtest_main_ndk libgtest_ndk
 endif
 
 ifdef LOCAL_MODULE_PATH