Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/f4601a788763
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #21446 from AndreiH/bug_1035136

Bug 1035136 - Intermittent Homescreen UI Tests failures: test_homescreen...

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https://hg.mozilla.org/integration/gaia-central/rev/10690cf82694
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 1035136 - Intermittent Homescreen UI Tests failures: test_homescreen_launch_app.TestLaunchApp.test_launch_app
Bumping manifests a=b2g-bump