Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/35aa509d2136
Author: Jan Keromnes <janx@linux.com>
Desc: Merge pull request #15870 from jankeromnes/memory

Bug 963498 - Display app memory information. r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/c864eebeab60
Author: Jan Keromnes <janx@linux.com>
Desc: Bug 963498 - Add memory tracking to the Developer HUD. r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/dd61cd040d1a
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 977337 - disabling intermittent test for further investigation
Bumping manifests a=b2g-bump