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

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https://hg.mozilla.org/integration/gaia-central/rev/68dba28a2316
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #19320 from crdlc/bug-1010352

Bug 1010352 - (vertical-homescreen) Add Pinch to Zoom to Settings

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https://hg.mozilla.org/integration/gaia-central/rev/0f9c2aacd36d
Author: crdlc <crdlc@tid.es>
Desc: Bug 1010352 - (vertical-homescreen) Add Pinch to Zoom to Settings

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "cb66994a0ba311042c59cb7363c0bad71d26f63f", 
+    "revision": "68dba28a2316407866e742e97384778168c65458", 
     "repo_path": "/integration/gaia-central"
 }