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

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https://hg.mozilla.org/integration/gaia-2_1/rev/8c771da07b4a
Author: Evan Tseng <itoyxd@gmail.com>
Desc: Merge pull request #25523 from evanxd/bug-1088685

Bug 1088685 - Update node modules r=mcav

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https://hg.mozilla.org/integration/gaia-2_1/rev/fbd48031fc8f
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 1088685 - Update node modules
Bumping manifests a=b2g-bump