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

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https://hg.mozilla.org/integration/gaia-central/rev/e964061bd9cf
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #20712 from davidflanagan/bug1026846

Bug 1026846: require the type parameter for FL app view activity r=amac

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https://hg.mozilla.org/integration/gaia-central/rev/b46f090450d3
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1026846: require the type parameter for FL app view activity
Bumping manifests a=b2g-bump