Add header separator to repo_search layout

Author: kevinsawicki

app/res/layout/repo_search.xml

@@ -14,14 +14,22 @@
   See the License for the specific language governing permissions and
   limitations under the License.
 -->
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent" >
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+  android:layout_width="match_parent"
+  android:layout_height="match_parent" >
+
+  <View
+    android:id="@+id/v_header_separator"
+    style="@style/HeaderSeparator"
+    android:layout_alignParentLeft="true"
+    android:layout_alignParentTop="true" />
 
-    <fragment
-        android:id="@android:id/list"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        class="com.github.mobile.ui.repo.SearchRepositoryListFragment" />
+  <fragment
+    android:id="@android:id/list"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_alignParentLeft="true"
+    android:layout_below="@id/v_header_separator"
+    class="com.github.mobile.ui.repo.SearchRepositoryListFragment" />
 
-</FrameLayout>
+</RelativeLayout>