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

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https://hg.mozilla.org/integration/gaia-central/rev/d201d5385a53
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #21541 from AndreiH/bug_1036390

Bug 1036390 - Intermittent fail for test_browser_bookmark.TestBrowserBoo...

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https://hg.mozilla.org/integration/gaia-central/rev/12f783086dfa
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 1036390 - Intermittent fail for test_browser_bookmark.TestBrowserBookmark
Bumping manifests a=b2g-bump