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

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https://hg.mozilla.org/integration/gaia-central/rev/cb4ca43d80f0
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #26419 from KevinGrandon/bug_1100305_browser_navigate_test

Bug 1100305 - [browser_navigate_landing_page_test.js] Re-enabling test by not sending keypress until after app window validation

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https://hg.mozilla.org/integration/gaia-central/rev/ffae7bbf0e7b
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1100305 - [browser_navigate_landing_page_test.js] Try re-enabling test by not sending keypress until after app window validation a=testonly

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "04db79c816869f304dc8a87ebb5c4ef151dc0a4c", 
+    "revision": "cb4ca43d80f02a0a8760a8ecef6d0d7edc835af8", 
     "repo_path": "integration/gaia-central"
 }