Bumping gaia.json for 4 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/d30b535b6606
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #16023 from KevinGrandon/bug_945481_sms_sticky_headers_1_3

Bug 945481 - [Messages] Implement position:sticky for fixed headers r=julienw

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https://hg.mozilla.org/integration/gaia-1_3/rev/b4bc8e12ceac
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 945481 - [Messages] Implement position:sticky for fixed headers r=julienw

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https://hg.mozilla.org/integration/gaia-1_3/rev/e260365f5649
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #15986 from viorelaioia/bug_968224

Bug 968224 - [1.3] Update locator in tap_hang_up method

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https://hg.mozilla.org/integration/gaia-1_3/rev/3d2f65fb0a0f
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 968224 - [1.3] Update locator in tap_hang_up method