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

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https://hg.mozilla.org/integration/gaia-central/rev/8a5c738c3741
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #21683 from zacc/bug_1038082

Bug 1038082 - switch_to_frame automatically in send_sms method

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https://hg.mozilla.org/integration/gaia-central/rev/14cb6740a1a9
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1038082 - switch_to_frame automatically in send_sms method

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https://hg.mozilla.org/integration/gaia-central/rev/88dcf91a7c1f
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #21699 from EverythingMe/1028674-collection-icon-dedupe

Bug 1028674 - [Collection app] Generated icon shows duplicate apps

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https://hg.mozilla.org/integration/gaia-central/rev/61cdead89303
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 1028674 - [Collection app] Generated icon shows duplicate apps
Bumping manifests a=b2g-bump