Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/f929b0fa9ab4
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20544 from KevinGrandon/bug_1025609_calendar_uuid_path_fix

Bug 1025609 - Unable to add a Gmail calendar

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https://hg.mozilla.org/integration/gaia-2_0/rev/b86fe658f628
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #20243 from gabrielesvelto/bug-1022554-do-not-launch-before-populating-the-message

Bug 1022450 - Don't show the "WAP Push Message" string in the header when opening a message
r=julienw

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https://hg.mozilla.org/integration/gaia-2_0/rev/8cac3ab61e90
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #20275 from lanker-sony/1022733-splash_icon

Bug 1022733 - Entry points lost their splash screen/overlay icons
Bumping manifests a=b2g-bump