Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/2e49a1a7f182
Author: Martijn <martijn.martijn@gmail.com>
Desc: Merge pull request #29287 from mwargers/sublist_view.py

Bug 1149886 - using <bdi> to replace <span> at Music app results in unab...

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https://hg.mozilla.org/integration/gaia-central/rev/685b8886c5a8
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1149886 - using <bdi> to replace <span> at Music app results in unable to locate <span.list-song-index> error

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https://hg.mozilla.org/integration/gaia-central/rev/09ab1af92099
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1148259 - merge pull request #29229 from azasypkin:bug-1148259-rtl-duplicates-view to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/70d679d1db97
Author: Aleh Zasypkin <azasypkin@mozilla.com>
Desc: Bug 1148259 - [RTL][Contacts]The "+" symbol is shown at wrong side of phone number in "Duplicates found" view. Added <bdi> wrapper nodes. r=arcturus

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "bad7e6bc9b917daac4f4c8a3814323b5723ab07f", 
+        "git_revision": "cc47ffdab0e1c4f7341af3f729584a31af6b4e27", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "90c2fba7d4ee29dacb15f6f10047030951511821", 
+    "revision": "2e49a1a7f182f6b5a9ac9b061ff2fffb93a0279e", 
     "repo_path": "integration/gaia-central"
 }