Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/fef8c6363145
Author: Dale  Harvey <dale@arandomurl.com>
Desc: Merge pull request #10785 from leob2g/bug_890176_filmstrip_preview_when_video_recording

 Bug 890176 - [Camera] Filmstrip preview opens even when video recording starts. r=daleharvey

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https://hg.mozilla.org/integration/gaia-central/rev/d9ea6f673b67
Author: jyothiprasadg <jyothi.prasad@lge.com>
Desc:  Bug 890176 - [Camera] Filmstrip preview opens even when video recording starts

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "ea5f4bc07ffe9a0f8895f56f95be566dc44fbf6f", 
+    "revision": "fef8c63631451a6f5122e8613a9443b6f9a573ce", 
     "repo_path": "/integration/gaia-central"
 }