Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/7c5bff4e8f1f
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #31502 from DouglasSherk/1196992-hosted

Bug 1196992 - Import hosted_apps/* folder into the build in all configurations. r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/9b360c9a89dc
Author: Doug Sherk <github@sherk.me>
Desc: Bug 1196992 - Import hosted_apps/* folder into the build in all configurations, update default Homescreen arrangement. r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/80a928971db8
Author: spark-bot <drs+sparkbot@mozilla.com>
Desc: Bump hosted apps

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "42789232109518b9d582bfb52105e83c49319338", 
+        "git_revision": "03387127ae7eb865919cf3a0909036c874431778", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "02044a2ff36b1897a6661772abf42fb58981eb77", 
+    "revision": "7c5bff4e8f1fd30376eeffd856374b2bcb27b693", 
     "repo_path": "integration/gaia-central"
 }