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

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https://hg.mozilla.org/integration/gaia-central/rev/5785265eed24
Author: Wes Kocher <kwierso@gmail.com>
Desc: Re-land Cwiiis/bug1210737-new-homescreen-startup-opt-order

This reverts commit ea18563744373ebd503e7ba46fd4c7197fb66dd8.

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https://hg.mozilla.org/integration/gaia-central/rev/dc77aa000d21
Author: Wes Kocher <kwierso@gmail.com>
Desc: Revert "Merge pull request #31910 from gmarty/Bug-1196809-Pick-best-available-icon-for-pinned-sites-on-homescreen" for breaking gij(7)

This reverts commit 8f02e2b33ff13656066137cae70abf6b22b0de99, reversing
changes made to 5ecc0634430e60f730d09b59822b9959c16d8d97.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "ea18563744373ebd503e7ba46fd4c7197fb66dd8", 
+        "git_revision": "dd9fe1df3f15991e5f7400b8a72f5b7bd2ee695a", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "2d1497c158d1088767becda151235b82bf019ece", 
+    "revision": "5785265eed24ed8a4dc1c399f6cc01ed6a8d64a3", 
     "repo_path": "integration/gaia-central"
 }