Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_4/rev/c484ef7da2c1
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #21789 from RudyLu/keyboard/Bug1036075_2

Bug 1036075 - [L10n] Keyboard goes CAPS LOCK after typing 100 characters and selecting a suggestion.
r=djf

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https://hg.mozilla.org/integration/gaia-1_4/rev/4437848f8064
Author: wei.gao <wei.gao@spreadtrum.com>
Desc: Merge pull request #22006 from weigao123/bug1039957-master

Bug 1039957 - [master] Make only check box hide when FDN enabled. r=Arthur.

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https://hg.mozilla.org/integration/gaia-1_4/rev/3e1e926b92c7
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #22018 from anefzaoui/v1.4/bug-876825

[v1.4] Bug 876825 - Mixed LTR & RTL content support in text input fields and textarea

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https://hg.mozilla.org/integration/gaia-1_4/rev/e1673165e506
Author: Ahmed Nefzaoui <nefzaoui.ahmed@hotmail.com>
Desc: [v1.4] Bug 876825 - Mixed LTR & RTL content support in text input fields and textarea
Bumping manifests a=b2g-bump