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

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https://hg.mozilla.org/integration/gaia-central/rev/8d147022629d
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #31307 from punamdahiya/Bug1080104

Bug 1080104 - [Gallery] remove the memory-backed blob workaround hack from bug 1063658 r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/82bfe23878a5
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1080104 - [Gallery] remove the memory-backed blob workaround hack from bug 1063658

This reverts commit b46e28a4d9d042452b2f1fe07a191317caccc6fa, reversing
changes made to 9903497debc38227a158e4719871f1ac73691113.

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https://hg.mozilla.org/integration/gaia-central/rev/fb423e147baa
Author: Zibi Braniecki <zibi@braniecki.net>
Desc: Merge pull request #31927 from zbraniecki/1206306-migrate-communications-to-intl-api

Bug 1206306 - Migrate remaining mozL10n.DateTimeFormat's in Communications to Intl API. r=arcturus,drs

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https://hg.mozilla.org/integration/gaia-central/rev/1143b53853ea
Author: Zibi Braniecki <gandalf@mozilla.com>
Desc: Bug 1206306 - Migrate remaining mozL10n.DateTimeFormat's in Communications to Intl API

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "dc08670f216fc9bc13568f74db8550035c055f14", 
+        "git_revision": "342f5b3f7865e68b1885258c53c23204f6da1b97", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "415ad747f92b42cf0b81db686f21b8618ad47bc2", 
+    "revision": "8d147022629d58c4806fc9582b70a3b5385a7560", 
     "repo_path": "integration/gaia-central"
 }