Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/df6c2fa13055
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #27324 from jmcanterafonseca/fix_visibility_headers

Bug 1097553 - [Flame][Contacts] Can't enter the settings page when we ta...

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https://hg.mozilla.org/integration/gaia-central/rev/508cc02c958d
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1097553 - [Flame][Contacts] Can't enter the settings page when we tap settings button in contacts list page.

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https://hg.mozilla.org/integration/gaia-central/rev/19fc60ce2506
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #27346 from jmcanterafonseca/fix_msg_no_contacts

Bug 1086260 - [Contacts] Wrong message opening contact list (pick activi...

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https://hg.mozilla.org/integration/gaia-central/rev/b920677fd454
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1086260 - [Contacts] Wrong message opening contact list (pick activity) if no contacts are stored in the device.

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https://hg.mozilla.org/integration/gaia-central/rev/3ebe52b70a7d
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #27348 from jmcanterafonseca/buttons_share

Bug 1120392 - [Contacts] [sharing] Need an icon for contacts sharing in ...

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https://hg.mozilla.org/integration/gaia-central/rev/91c59b7f1546
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1120392 - [Contacts] [sharing] Need an icon for contacts sharing in the Comms theme

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "3b0c3f5215830078cd1a15e4e916d016bf3ffe77", 
+    "revision": "df6c2fa130555534dbd9961cb1c7c46c72f41e15", 
     "repo_path": "integration/gaia-central"
 }