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

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https://hg.mozilla.org/integration/gaia-1_3/rev/1a1cfccb8243
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Revert "Merge pull request #17991 from bobsilverberg/power_button"

This reverts commit 86301a24e8a9bf7153b58be597323dc92bca9b99, reversing
changes made to 76e87fb7c2aa4ae4311b92ddab3e3fd484f28094.
Bumping manifests a=b2g-bump
Bug 986678 - Fix type check in TryAddTypeBarrierForWrite. r=bhackett, a=1.3+
Bug 986843 - Replace AutoHoldZone with AutoCompartmentRooter. r=terrence, a=1.3+
Bug 919592 - Ionmonkey (ARM): Guard against branches being out of range and bail out of compilation if so. r=mjrosenb, a=1.3+
Bug 989047 - Increase canplaythrough timeouts to accomodate B2G slowness. r=jesup, a=test-only
Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/6a1bfb870558
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #18058 from mcav/gelam-tarako

Bug 991567 - [Tarako][Email] Email app is killed while downloading an at...

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https://hg.mozilla.org/integration/gaia-1_3/rev/acd5c15cf7ab
Author: Fernando Rodríguez Sela <frsela@tid.es>
Desc: Merge pull request #17655 from frsela/STK/Bug988362

Bug 988362 - [STK]The maxlength of the inputbox didn't set corretly in GET_INPUT command. (Increment wait time), r=timdream

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https://hg.mozilla.org/integration/gaia-1_3/rev/39292f51dce7
Author: Kyle Machulis <kyle@nonpolynomial.com>
Desc: Merge pull request #17214 from qdot/983507-flight-mode-radio-off

Bug 983507 - Make airplane mode icon appear via airplaneMode setting, not RIL status
Bumping manifests a=b2g-bump
Bumping manifests a=b2g-bump
Merge b2g28 to v1.3t. a=merge