Bug 981637:  Make overflow events fire correctly in UpdateOverflow codepath.  r=mats

I confirmed that the mochitest fails without the patch and passes with
it, both standalone and in the directory harness.
Bug 983558 - Test for return type when inlining ForkJoinGetSlice. (r=nmatsakis)
Bug 984063 - bail out of ion/bug977674.js when parallel isn't defined instead of making mozilla-aurora permaorange
Bug 981362 - Bail out of parallel/bug976889.js when parallel is not defined, rather than making aurora permaorange
Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/eac5f068d5d3
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #17178 from cctuan/982645

Bug 982645 - [Gaia] [Build] unit test for preferences.js

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https://hg.mozilla.org/integration/gaia-central/rev/0471e039844d
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 982645 - [Gaia] [Build] unit test for preferences.js
Bumping manifests a=b2g-bump
Merge m-c to m-i
Merge m-c to b-i
Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/de57cd03d28a
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #16974 from KevinGrandon/bug_946852_search_mode

Bug 946852 - [Email] Search Mail field appears twice

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https://hg.mozilla.org/integration/gaia-central/rev/861e94eee5ac
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 946852 - [B2G][Email] Search Mail field appears twice on email search filter page when user reveals drag down search field r=jrburke
Bumping manifests a=b2g-bump
Merge b-i to m-c
Merge f-t to m-c