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

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https://hg.mozilla.org/integration/gaia-central/rev/9c1e3bc6fe8a
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #26979 from cctuan/1114902

Bug 1114902 - [TextSelection] JS marionette for non-editable field

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https://hg.mozilla.org/integration/gaia-central/rev/771dc773bd64
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1114902 - [TextSelection] JS marionette for non-editable field
Bumping manifests a=b2g-bump