Bumping gaia.json for 4 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/110172d2f16c
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #12057 from Rik/call-status-bar-908679

Bug 908679 - Redesign the status bar version of the call screen r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/1d49a0904c3e
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 908679 - Redesign the status bar version of the call screen

- Improve fake-oncall-desktop to never run on the phone
- Split oncall.css for the two states of the call screen

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https://hg.mozilla.org/integration/gaia-central/rev/472f255a7d52
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #11991 from arcturus/bug-909708

Bug 909708 - [CONTACTS] On Export contacts "To SIM" option is active when there isn't a SIM card in the device.

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https://hg.mozilla.org/integration/gaia-central/rev/532d5d695efd
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Bug 909708 - [CONTACTS] On Export contacts "To SIM" option is active when there isn't a SIM card in the device.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "ae79fff453684793bdc147519f257a284ba9a212", 
+    "revision": "110172d2f16cfe85e4107ec9427ce8d56243eab9", 
     "repo_path": "/integration/gaia-central"
 }