Bumping gaia.json for 1 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/e5e1839c6070
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 927062 - Remove the 'add call' button when in CDMA call waiting mode r=etienne
Backed out changeset 968f4dec5f9d (bug 916226) for causing bug 926116. a=lsblakk
Bug 914667 - PDF viewer doesn't resolve base URIs properly. r=abillings
Bug 915002 - Convert optional notification arguments to webidl dictionary, add directional/lang arguments. r=bz, r=fabrice, a=koi+
Bug 914685 - 0001. Support GSM network pin authentication. r=vicamo, a=koi+
Bug 914685 - 0002. HMAC authentication test case. r=vicamo, a=koi+
Bug 925381 - Fix mpeg4 video seek failure. r=nical, r=doublec, a=koi+
Bug 927322 - AudioDestinationNode should support weak reference. r=ehsan, a=koi+
Bug 916125 - Clip scroll layer items to the scroll port so the resulting layers have the proper clip. r=roc, a=koi+
Bug 927961 - Add ums.status so that settings app can determine if files are open. r=gwagner, a=koi+
Bug 927493 - Fast-path for certified apps CSP. r=geekboy, a=koi+
Bug 912902 - MMS/SMS: retrieve GSM MSISDN / CDMA MDN correctly. r=gene, a=koi+
Bumping gaia.json for 1 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/fc7bb7751073
Author: Gabriele Svelto <gabriele.svelto@gmail.com>
Desc: Bug 915081 - Hide the end-and-answer button during CDMA call waiting r=etienne

- Removed the end-and-answer button when in CDMA call waiting mode as it
  does not support ending the first call and answering the other one,
  the hold-and-answer button is enlarged to fill up the entire container
  under these conditions
- Added unit-tests covering the changes
Backed out changeset 014c984c7d51 (bug 927322) for B2G crashes. a=backout
Bug 807282 - Update marionette command/response to match that of the WebDriver spec; r=mdas, a=test-only
Bug 925771 - Generate consecutive window IDs to avoid collisions. r=ttaubert a=lsblakk
Bug 900910 - Initialize SessionStore earlier to catch windows opened immediately after startup. r=ttaubert a=lsblakk
Bug 917947: SearchEngine icons are small in the dialog. [r=mfinkle] [r=margaret] [a=lsblakk]
Bug 906227: Last tabs with switch-to-tab should not create new tabs. [r=margaret] [a=lsblakk]
Bug 918044 - Block layout requests while handling focus changes in TopSitesGridView (r=sriram) (a=lsblakk)