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

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https://hg.mozilla.org/integration/gaia-central/rev/f19f2033c2d1
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #23921 from davidflanagan/bug1064126

Bug 1064126: be more efficient with canvas memory r=russn

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https://hg.mozilla.org/integration/gaia-central/rev/9b7eb2532973
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1064126: be more efficient with canvas memory
Bumping manifests a=b2g-bump