Just tiny cosmetic fixes in makefile

Change-Id: I470ba8a03d70aa520311c50f5d21979f476798b7
diff --git a/tests/Android.mk b/tests/Android.mk
index 7cdabf2..0b54491 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-LOCAL_PATH:= $(call my-dir)
+LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 
 # We only want this apk build for tests.