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

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https://hg.mozilla.org/integration/gaia-1_4/rev/b766f43c1b09
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #23113 from nullaus/v1.4

bug 1049790 - v1.4 specific patch.

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https://hg.mozilla.org/integration/gaia-1_4/rev/91ef7f6d98d4
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: bug 1049790 - v1.4 specific patch.
Bumping manifests a=b2g-bump