Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/d06414b83b71
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1076701 - [Contact] Improve UI on index circle for the Contact list

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https://hg.mozilla.org/integration/gaia-2_1/rev/3148d5c3bb62
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 1093413 - [Camera] In video mode and the flash set to "On", when a User taps anywhere above the "Record" button, the flash turns off

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https://hg.mozilla.org/integration/gaia-2_1/rev/950ea5b43e0e
Author: Luke Chang <lchang@mozilla.com>
Desc: Bug 1083053 - [Midori] The screenshot preview window still overlays an app when switching apps
Bumping manifests a=b2g-bump