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

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https://hg.mozilla.org/integration/gaia-central/rev/0a62cdaaac7e
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #19040 from DouglasSherk/1006789-sms-appendthread-tests

Bug 1006789 - [Messages] Add tests for appendThread() in thread_list_ui_test.js. r=azasypkin

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https://hg.mozilla.org/integration/gaia-central/rev/c02bc3dd1128
Author: DouglasSherk <github@sherk.me>
Desc: Bug 1006789 - [Messages] Add tests for appendThread() in thread_list_ui_test.js. r=azasypkin
Bumping manifests a=b2g-bump