fixing the build break in notification_template_big_text.xml

Change-Id: Ibeef587e27d1f97dae2b6184be5e7b2548768f5e

Author: cwren

core/res/res/layout/notification_template_big_text.xml

@@ -78,7 +78,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginTop="-2dp"
-            android:layout_mgarginBottom="-2dp"
+            android:layout_marginBottom="-2dp"
             android:singleLine="true"
             android:fadingEdge="horizontal"
             android:ellipsize="marquee"