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

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https://hg.mozilla.org/integration/gaia-2_1/rev/14cf054f7829
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #24641 from cctuan/1074083-v21

Bug 1074083 - [NFC][KK] Background of shrinking UI would show app icons if website has ever been run at the background

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https://hg.mozilla.org/integration/gaia-2_1/rev/02ad0d2c4f16
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1074083 - [NFC][KK] Background of shrinking UI would show app icons if website has ever been run at the background
Bumping manifests a=b2g-bump