Bumping gaia.json for 2 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/f79b01c16580
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #13347 from AndreiH/v1.2-picker

Bug 932250 - Write a test for context menu activity picker on aurora

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https://hg.mozilla.org/integration/gaia-1_2/rev/e5cc94f20837
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 932250 - Write a test for context menu activity picker on aurora