Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/c53fd3d63006
Author: Julien Wajsberg <felash@gmail.com>
Desc: Revert "Merge pull request #22398 from evanxd/bug-1047292"

This reverts commit 9ef7ee6031c4a7a6e2c6d9e018066a5ae484d3fc, reversing
changes made to eae74908a7ab8493691b7fc6ec91d969821d9798.

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https://hg.mozilla.org/integration/gaia-central/rev/522c7f570ced
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #22347 from RudyLu/keyboard/bug1046061-multiple_symbol_pages_2

Bug 1046061 - Make pinyin levarge the original page switching functions.
r=timdream, luke-chang.

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https://hg.mozilla.org/integration/gaia-central/rev/a1b2d095a5bb
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1046061 - Make pinyin levarge the original page switching functions.
 - Use keycode 65 to represent "'" so that pinyin won't have to know which
page it is in.

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https://hg.mozilla.org/integration/gaia-central/rev/62dbf50a297d
Author: gitmai <mri@tid.es>
Desc: Merge pull request #22407 from gitmai/bug-1044299-CC-rtl-fixes

Bug 1044299 - [RTL][Usage][Cost Control] Cost Control app/Usage app need...
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/70184f4764b8
Author: mai <mri@tid.es>
Desc: Bug 1044299 - [RTL][Usage][Cost Control] Cost Control app/Usage app needs to have RTL taken into account

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "15a76be03f0177d14b2dbc2126240058e3ddc12e", 
+    "revision": "c53fd3d630066c4ff80cfd34eaa0243838175874", 
     "repo_path": "/integration/gaia-central"
 }