Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/f7bb5e97b6d6
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #20515 from dchunwong/fixgalcrop

Bug 1022618- Adjust current_scale in fullscreen_image.py to return a list of numbers rather than a string.

========

https://hg.mozilla.org/integration/gaia-central/rev/33bf949d1da0
Author: Dylan Chun Wong <d.chunwong@gmail.com>
Desc: Adjust current_scale in fullscreen_image.py to return a list of the scale x, y rather than a string

========

https://hg.mozilla.org/integration/gaia-central/rev/c4bad0c38477
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 1014706 - Hide the accept button when in SI/SL mode r=julienw

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "591e51dda96842f6ed6c6b8f903ff3e853f34db8", 
+    "revision": "f7bb5e97b6d65e73020516440dd69edfeff32178", 
     "repo_path": "/integration/gaia-central"
 }