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

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https://hg.mozilla.org/integration/gaia-central/rev/913f6a03163b
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #22840 from Cwiiis/bug1050319-add-new-window-to-system-browser

Bug 1050319 - Add 'new window' to system browser menu. r=vingtetun,kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/7737dcd4e8c4
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1050319 - Test browser chrome 'open new window' option. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/c1137973ed68
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1050319 - Add 'New Window' to browser system menu. r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/c4a72cc9fc2b
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #22626 from Rik/call-db-insert-duration-1047351

Call db insert duration 1047351 r=drs

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https://hg.mozilla.org/integration/gaia-central/rev/30a118379fea
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 1047351 - Insert call durations in the call log database

- Remove superfluous comment about data description
- Simplify the add() method by splitting work in subfunctions

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https://hg.mozilla.org/integration/gaia-central/rev/0a7b05dfe493
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 1047351 - JSHint cleanup

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "def8d5428016ae322c857656db0df0d40e84de80", 
+    "revision": "913f6a03163ba2087385d08cdbabfea2c8b46491", 
     "repo_path": "/integration/gaia-central"
 }