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

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https://hg.mozilla.org/integration/gaia-central/rev/feb5f46f2163
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #18557 from gasolin/issue-993832

Bug 993832 - wrong multi-res resource file name, r=yurenju

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https://hg.mozilla.org/integration/gaia-central/rev/97cdc0530291
Author: gasolin <gasolin@gmail.com>
Desc: Bug 993832 - wrong multi-res resource file name

Conflicts:
	apps/homescreen/everything.me/images/Wallpaper@2.25x.png

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "bfb1c28aba8d335ae60c07b829346143993fef09", 
+    "revision": "feb5f46f21632a2a616918d1c324fca21b188957", 
     "repo_path": "/integration/gaia-central"
 }