Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/732f412e37ce
Author: russnicoletti <rnicoletti@mozilla.com>
Desc: Merge pull request #26341 from russnicoletti/bug-1101816

Bug 1101816 - [RTL][Video] video controls are reversed in RTL context r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/e7f056210900
Author: Russ Nicoletti <rnicoletti@mozilla.com>
Desc: Bug 1101816 - [RTL][Video] video controls are reversed in RTL context

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https://hg.mozilla.org/integration/gaia-central/rev/7a2007386608
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #26383 from KevinGrandon/bug_1103627_marionette_client_loader_system

Bug 1103627 - [System] Use a marionette client loader to include the system app

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https://hg.mozilla.org/integration/gaia-central/rev/e6d15e07c499
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1103627 - [System] Use a marionette client loader to include the system app r=etienne

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "696417134518a31e49957842056d750c281d3b58", 
+    "revision": "732f412e37ceae8a1d717f6bde5c593a900ac0fe", 
     "repo_path": "integration/gaia-central"
 }