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

========

https://hg.mozilla.org/integration/gaia-central/rev/f63fa4e31cea
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #14626 from EragonJ/bug-945140-another-try

Bug 945140 - [DSDS] SIM 2 can still MT/MO SMS and MT voice call in airpl...

========

https://hg.mozilla.org/integration/gaia-central/rev/6aec6f6cd451
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 945140 - [DSDS] SIM 2 can still MT/MO SMS and MT voice call in airplane mode.

- make airplane mode work in dsds & single sim

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "23011328ff7d6a9677558137ce2522e7205a780b", 
+    "revision": "f63fa4e31cea664886f43504529d96bc046506fc", 
     "repo_path": "/integration/gaia-central"
 }