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

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https://hg.mozilla.org/integration/gaia-central/rev/c2ddcb795e75
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #15959 from EragonJ/bug-967708

Bug 967708 - [B2G][l10n][Settings] German: "Change PIN" doesn't use loca...

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https://hg.mozilla.org/integration/gaia-central/rev/8ec6f75ad859
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 967708 - [B2G][l10n][Settings] German: "Change PIN" doesn't use localization

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "7c5532211028e66b169cff49fe7e8bbc5b40cb2d", 
+    "revision": "c2ddcb795e75a54864db3e5db75e7a4d72380d14", 
     "repo_path": "/integration/gaia-central"
 }