Bumping gaia.json for 5 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/b8c99e3ba894
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1053647 - delete space when reverting an autocorrection and don't insert space when user selects a word suggestion

Conflicts:
	tests/python/gaia-ui-tests/gaiatest/tests/accessibility/keyboard/test_a11y_keyboard_word_suggestions.py
	tests/python/gaia-ui-tests/gaiatest/tests/functional/keyboard/test_keyboard_predictive_key.py

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https://hg.mozilla.org/integration/gaia-2_1/rev/f36d3ae256d2
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24714 from giovannic/ftu-flow-21

Bug 1067684 - The FTU flow should be aware of network connectivity

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https://hg.mozilla.org/integration/gaia-2_1/rev/776c8c45c094
Author: Giovanni Charles <giovanni.charles@gmail.com>
Desc: Bug 1067684 - The FTU flow should be aware of network connectivity

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https://hg.mozilla.org/integration/gaia-2_1/rev/cbafa80921f8
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24755 from benfrancis/1043959-2.1

Bug 1043959 - Remove the browser app r=kgrandon

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https://hg.mozilla.org/integration/gaia-2_1/rev/02e2714c3f5d
Author: Ben Francis <ben@tola.me.uk>
Desc: Bug 1043959 - Remove the browser app r=kgrandon
Bumping manifests a=b2g-bump