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

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https://hg.mozilla.org/integration/gaia-central/rev/8f77a853f06c
Author: evanxd <itoyxd@gmail.com>
Desc: Merge pull request #22398 from evanxd/bug-1047292

Bug 1047292 - Clean up the test code

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https://hg.mozilla.org/integration/gaia-central/rev/a93d13243997
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 1047292 - Clean up the test code
Bumping manifests a=b2g-bump