Update git submodules

* Update plugins/gitiles from branch 'master'
  to 22b8e242b5eaa9eae817b776bc862b096479ceaa
  - Remove unused local variable
    
    Signed-off-by: Edwin Kempin <ekempin@google.com>
    Change-Id: I124980ec71574c7ddbcdddb33f044c86f8fd17b5
    
diff --git a/plugins/gitiles b/plugins/gitiles
index 3531010..22b8e24 160000
--- a/plugins/gitiles
+++ b/plugins/gitiles
@@ -1 +1 @@
-Subproject commit 3531010e04d9d548fe1fd93662ca85ae25d4a9a6
+Subproject commit 22b8e242b5eaa9eae817b776bc862b096479ceaa