Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/47cc74116cc2
Author: Russ Nicoletti <rnicoletti@mozilla.com>
Desc: Bug 1025147 - [B2G][Video]The slider overlaps the video time length when the playback ends

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https://hg.mozilla.org/integration/gaia-2_1/rev/5e4ecba56174
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1073356 - [Calendar] Wobbly Refresh Icon Animation

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https://hg.mozilla.org/integration/gaia-2_1/rev/93436963a049
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24903 from punamdahiya/bug1076158_v2.1

Bug1076158-[Video]-Fix of options button not responsive on the first touch r=wilsonpage

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https://hg.mozilla.org/integration/gaia-2_1/rev/4c1cacbb9577
Author: Punam Dahiya <punamdahiya@yahoo.com>
Desc: Bug1076158-[Video]-Fix of options button not responsive on the first touch r=wilsonpage

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https://hg.mozilla.org/integration/gaia-2_1/rev/9d2234174e2f
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 1071988 - Include date_time_helper.js

Conflicts:
	apps/clock/onring.html

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https://hg.mozilla.org/integration/gaia-2_1/rev/7c33f8a17e60
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1077605 - [Email] Screen becomes black when scrolling through list fast
Bumping manifests a=b2g-bump