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

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https://hg.mozilla.org/integration/gaia-central/rev/876461a11bb4
Author: Zibi Braniecki <zibi@braniecki.net>
Desc: Merge pull request #32544 from zbraniecki/1215471-fix-a-regression-introduced-by-patch-from-bug-1212151

Bug 1215471 - Update activities.js in Contacts to work with VcardFilename returning a promise. r=arcturus

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https://hg.mozilla.org/integration/gaia-central/rev/977e9dcdeed4
Author: Zibi Braniecki <gandalf@mozilla.com>
Desc: Bug 1215471 - Update activities.js in Contacts to work with VcardFilename returning a promise

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https://hg.mozilla.org/integration/gaia-central/rev/c5f262047ee4
Author: No-Jun Park <npark@mozilla.com>
Desc: Merge pull request #32519 from npark-mozilla/1215673

Bug 1215673 - Imagecompare RTL: wait until the screen transition is complete

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https://hg.mozilla.org/integration/gaia-central/rev/fbe2ea87835a
Author: No-Jun Park <npark@mozilla.com>
Desc: Bug 1215673 - Imagecompare RTL: wait until the screen transition is complete

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "a87f947366c2e044bd6336e1982419ac45378969", 
+        "git_revision": "d344af789c6abadb754262af47827c2057b082db", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "6878d4020e3c1a3b020031cce83c4b437ad42669", 
+    "revision": "876461a11bb47e4e00b520c353c39a929c95f640", 
     "repo_path": "integration/gaia-central"
 }