Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/3ea3e7acebbf
Author: Wilson Page <wilsonpage@me.com>
Desc: Merge pull request #17949 from wilsonpage/bug/991506

Bug 991506 - flash and swap buttons respond to touches even when hidden

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https://hg.mozilla.org/integration/gaia-central/rev/abe2320de354
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 991506 - flash and swap buttons respond to touches even when hidden

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https://hg.mozilla.org/integration/gaia-central/rev/7fd40cbd297a
Author: evanxd <itoyxd@gmail.com>
Desc: Merge pull request #17891 from evanxd/bug-987356

Bug 987356 - Migrate week_view_test.js to use new "view" code

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https://hg.mozilla.org/integration/gaia-central/rev/3783a0300520
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 987356 - Migrate week_view_test.js to use new "view" code.
Bumping manifests a=b2g-bump