Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/554bbc1378dd
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #34100 from albertopq/1250913-intermitent-tv-pin

Bug 1250913 - Fixing intermittent issues on Pinning websites to the home (tv) r=lchang

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https://hg.mozilla.org/integration/gaia-central/rev/da1a16ceaf00
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1250913 - Fixing intermittent issues on Pinning websites to the home (tv)

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "78a670b73b4ddc250abd4e2bbaae8cfda31f8287", 
+        "git_revision": "ecbf7fd58b2bcd570ab679514e93019c5b3ac60f", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "1503abec2faedd15e0eafaaca5de97ed447141ba", 
+    "revision": "554bbc1378dd14867ef6af80db7413783a57b663", 
     "repo_path": "integration/gaia-central"
 }