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

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https://hg.mozilla.org/integration/gaia-central/rev/aff515e4b4a6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #14998 from KevinGrandon/bug_956012_update_mobile_shims

Bug 956012 - Desktop b2g with local profile is trying to load the SIM / JavaScript error: conn.setVoicePrivacyMode is not a function

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https://hg.mozilla.org/integration/gaia-central/rev/9bb3ec8d604c
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 956012 - Desktop b2g with local profile is trying to load the SIM / JavaScript error: conn.setVoicePrivacyMode is not a function

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "b61e95024e07f0ad99e20802953fb8b62ae02505", 
+    "revision": "aff515e4b4a6b84844fe9fbf866a332a9d0b90b6", 
     "repo_path": "/integration/gaia-central"
 }