Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/720c32365061
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #28836 from cctuan/1131515

Bug 1131515 - Running multilocale.js and l10n.js on node.js

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https://hg.mozilla.org/integration/gaia-central/rev/69d22b1a6d98
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1131515 - Running multilocale.js and l10n.js on node.js

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https://hg.mozilla.org/integration/gaia-central/rev/71564ad62129
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #28844 from ferjm/bug1125075

Bug 1125075 - [Flame][Settings]There are reduplicative years in year lis...

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https://hg.mozilla.org/integration/gaia-central/rev/2becc5d29617
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Bug 1125075 - [Flame][Settings]There are reduplicative years in year list of Age Verification page. r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/6a493637e380
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #28841 from ferjm/bug1140329.contacts.bday

Bug 1140329 - [Contacts]The contact's Birthday is not same as that in PC...

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https://hg.mozilla.org/integration/gaia-central/rev/462da2fb9e6f
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Bug 1140329 - [Contacts]The contact's Birthday is not same as that in PC if it is a contact imported from oultlook account. r=francisco

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "891a7220030098865ccbc0fb2e2d591ebc347756", 
+        "git_revision": "78d80e8138d7efdbac42453776a4bfa0f48bee59", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "19e1e46b4796de08560bb3542c2e7ae91947891e", 
+    "revision": "720c323650611ceb86191ffa8025de7b30414a30", 
     "repo_path": "integration/gaia-central"
 }