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

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https://hg.mozilla.org/integration/gaia-central/rev/78d8f5fe3e71
Author: Russ Nicoletti <rnicoletti@mozilla.com>
Desc: Merge pull request #28470 from russnicoletti/bug-1135278

Bug 1135278 - shared/js/media/video_player.js leaks memory r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/3284f81583ef
Author: Russ Nicoletti <rnicoletti@mozilla.com>
Desc: Bug 1135278 - shared/js/media/video_player.js leaks memory

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "e02ec55de52d2f410c44b76a1ffc3d9713eb2ea1", 
+        "git_revision": "b88855ca08faffe0f29061b869c5c524225c029e", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "25ced14d23036f3b61be00fe77365f44ed2e7aee", 
+    "revision": "78d8f5fe3e71d417ed6017a7b185b1a00205be09", 
     "repo_path": "integration/gaia-central"
 }