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

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https://hg.mozilla.org/integration/gaia-central/rev/ff33dffb99d9
Author: Min-Zhong "John" Lu <jlu@mozilla.com>
Desc: Merge pull request #26053 from mnjul/bug_1073806_bypass_system_resize_for_kb

Bug 1073806 - In Gaia, bypass system-resize in LayoutManager in window resize event if Keyboard is showing and we've just changed orientation. r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/08d579d8eb3c
Author: John Lu [:mnjul] <jlu@mozilla.com>
Desc: Bug 1073806 - In Gaia, bypass system-resize in LayoutManager in window resize event if Keyboard is showing and we've just changed orientation
Bumping manifests a=b2g-bump