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

========

https://hg.mozilla.org/integration/gaia-central/rev/d91d2e43ef94
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Merge pull request #31870 from justindarc/bug1204716

Bug 1204716 - [Music][NGA] Wire up music controls to lockscreen

========

https://hg.mozilla.org/integration/gaia-central/rev/55e74e943cf1
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Bug 1204716 - [Music][NGA] Wire up music controls to lockscreen

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "19696d5db8e7e078204b15597b9d01c788e5f04f", 
+        "git_revision": "46f54ba279858b677793f78b7465b3a82f799eef", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "10c84c0009d36f5d2ce8c288ef587286592983c4", 
+    "revision": "d91d2e43ef947fda5a496c64a7bb23b5a735b247", 
     "repo_path": "integration/gaia-central"
 }