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

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https://hg.mozilla.org/integration/gaia-central/rev/f7eb7deae385
Author: Jim Porter <jporter@mozilla.com>
Desc: Merge pull request #30454 from jimporter/music-invalid-files

[Bug 1171202] Music app's scanning process can stall from invalid files

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https://hg.mozilla.org/integration/gaia-central/rev/2690483ce03d
Author: Jim <jporter@mozilla.com>
Desc: [Bug 1171202] Music app's scanning process can stall from invalid files

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "55858863f320efc73c0bfd9b3eef905e49998e39", 
+        "git_revision": "fc27d9f5d58ae6f65a644150d15b9a0f01dadec4", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "1017257c6c025ab47d3a7448ca7aecaf5a2edc84", 
+    "revision": "f7eb7deae385428c61b342224a3dd960dc91e479", 
     "repo_path": "integration/gaia-central"
 }