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

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https://hg.mozilla.org/integration/gaia-central/rev/6a306f592d98
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #26530 from viorelaioia/bug_1102931

Bug 1102931 - Intermittent test_ftu_with_tour.py TestFtu.test_ftu_with_t...

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https://hg.mozilla.org/integration/gaia-central/rev/ddfd28c9ecc5
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1102931 - Intermittent test_ftu_with_tour.py TestFtu.test_ftu_with_tour

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "b49cdccea0f3ab389ded76e60976d1b16e9d8874", 
+    "revision": "6a306f592d986b5064e72bac0e76315ff8e4fcfd", 
     "repo_path": "integration/gaia-central"
 }