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

========

https://hg.mozilla.org/integration/gaia-central/rev/1cc5fea8d06c
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 917523 - disable test_settings_change_keyboard_language for desktopb2g builds a=test-only

========

https://hg.mozilla.org/integration/gaia-central/rev/cdc162d417cc
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #12457 from bobsilverberg/917523

Bug 917523 - repair and reenable test_keyboard_change_language, r=zac

========

https://hg.mozilla.org/integration/gaia-central/rev/d52cd13c5309
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Bug 917523 - repair and reenable test_keyboard_change_language, r=zac

========

https://hg.mozilla.org/integration/gaia-central/rev/f38f7b02261a
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: bug 917523 - repair and reenable test_keyboard_change_language r=alint/bebe