Update git submodules

* Update plugins/gitiles from branch 'master'
  to a25b295040d6dfa6b27d42ed10ff0539ab66ac71
  - Merge branch 'stable-2.16'
    
    * stable-2.16:
      Upgrade bazlets to latest stable-2.16
      Upgrade bazlets to latest stable-2.15
      Upgrade bazlets to latest stable-2.14
      Update bazlets to fix build with bazel 0.23
      Upgrade bazlets to latest stable-2.16 to build with 2.16.6 API
      Upgrade bazlets to latest stable-2.15 to build with 2.15.11 API
    
    Change-Id: I90d5dc3c25f580420c96c141623ff92355e3a5f0
    
  - Merge branch 'stable-2.15' into stable-2.16
    
    * stable-2.15:
      Upgrade bazlets to latest stable-2.15
      Upgrade bazlets to latest stable-2.14
      Update bazlets to fix build with bazel 0.23
    
    Change-Id: I816a9fdb1dab476666faa1b63ef7e2c928d6ba7b
    
  - Upgrade bazlets to latest stable-2.16
    
    - Avoid using deprecated depset union
    - Automatically fix lint errors with buildifier
    - Use target JDK for GWT compilation
    
    Change-Id: I0c737e8969375562c57951fe177c0f50032a5ac4
    
  - Merge branch 'stable-2.14' into stable-2.15
    
    * stable-2.14:
      Upgrade bazlets to latest stable-2.14
    
    Change-Id: I8d5d14521dad95982c57d69e0c6813652348a928
    
  - Upgrade bazlets to latest stable-2.15
    
    - Avoid using deprecated depset union
    
    Change-Id: Ie3a94fa1bae439431f7f1f0cae13806500d48a58
    
  - Upgrade bazlets to latest stable-2.14
    
    - Avoid using deprecated depset union
    
    Change-Id: I0f56e2705f20496b970b3aa8e774daa555c1ba34
    
  - Update bazlets to fix build with bazel 0.23
    
    - Use target JDK for GWT compilation
    
    Bug: Issue 10536
    Change-Id: Ia8162d83ce616d9f571f57a34228b57f7fe4e1d3
    
  - Upgrade bazlets to latest stable-2.16 to build with 2.16.6 API
    
    Change-Id: Ibe73108adaca8f5bf0e13b9526e94f48d2b0a1d1
    
  - Merge branch 'stable-2.15' into stable-2.16
    
    * stable-2.15:
      Upgrade bazlets to latest stable-2.15 to build with 2.15.11 API
    
    Change-Id: Id21ef28e0fd54d35dfc85acb837b2cc22e06dc98
    
  - Upgrade bazlets to latest stable-2.15 to build with 2.15.11 API
    
    Change-Id: I04a7ced86adeca3f60a4bf9bb5473e2c4fba29eb
    
diff --git a/plugins/gitiles b/plugins/gitiles
index 623105f..a25b295 160000
--- a/plugins/gitiles
+++ b/plugins/gitiles
@@ -1 +1 @@
-Subproject commit 623105f14dca02cb294ed94a952f5e8ce0e96683
+Subproject commit a25b295040d6dfa6b27d42ed10ff0539ab66ac71