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

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https://hg.mozilla.org/integration/gaia-2_1/rev/dbf460747558
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1060045 - [Rocketbar] Hide search results when we receive an open-app event r=alive

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https://hg.mozilla.org/integration/gaia-2_1/rev/9be336e2e81f
Author: Eli Perelman <eli@eliperelman.com>
Desc: Bug 1058675 - Preventing SHB from overlaying system dialogs

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https://hg.mozilla.org/integration/gaia-2_1/rev/e241cc77e6e3
Author: TheoChevalier <theo.chevalier11@gmail.com>
Desc: Bug 1061983 - 'open' is hardcoded on lockscreen

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https://hg.mozilla.org/integration/gaia-2_1/rev/cf4dd744866f
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Bug 808740 - Disable auto punctuation for French layouts
Bumping manifests a=b2g-bump