Bumping gaia.json for 4 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/0cc52483f0f4
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #12704 from teodosia/unxfail-video-tests

Bug 924078 - Remove xfail for camera tests on aurora

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https://hg.mozilla.org/integration/gaia-1_2/rev/490f85bb9ec6
Author: Teodosia Pop <teodosia.pop@gmail.com>
Desc: Bug 924078 - Removed xfail for camera tests on aurora

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https://hg.mozilla.org/integration/gaia-1_2/rev/903bd86cfbd6
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #12707 from teodosia/fix-capture-video-aurora

Bug 924079 - Fixed failing /camera/test_camera_capture_video.py on aurora

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https://hg.mozilla.org/integration/gaia-1_2/rev/690fa0f12037
Author: Teodosia Pop <teodosia.pop@gmail.com>
Desc: Bug 924079 - Fixed failing /camera/test_camera_capture_video.py on aurora
Backed out changeset 47cb296e2627 (bug 919838) for Android bustage. a=backout
Bug 920397 - Ensure PContentParent doesn't close process handles multiple times. r=bsmedberg, a=lsblakk
Bug 906230 - Add HardwareUtils.isLowMemoryPlatform(). r=kats, a=lsblakk
Bug 906230 - Hide the Reading List page in about:home on low memory devices. r=sriram, a=lsblakk
Bug 917479 - Starting a simulator changes host and port settings. r=ochameau, a=lsblakk
Bug 922096 - OdinMonkey: prevent multiple concurrent parallel asm.js compilations. r=sstangl, a=lsblakk
Bug 922807 - Always draw images with OVER. r=roc, a=lsblakk

There's no reason I can see to draw them with SOURCE. SOURCE is slower with the
Azure wrapper (see FillAzure()). It is also slow with cairo when we have a
clip.
Bug 922429 - Don't leak GSN cache memory in IonBuilder. r=jandem, a=lsblakk
Bug 919981 - Dispatch app (un)install events via the webapps actor. r=fabrice, a=lsblakk