Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/7ab0bd23066f
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #21188 from viorelaioia/bug_1027144

Bug 1027144 - Re-enable test_homescreen_move_app.py, test_homescreen_del...

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https://hg.mozilla.org/integration/gaia-central/rev/9a6002a3a736
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1027144 - Re-enable test_homescreen_move_app.py, test_homescreen_delete_app.py

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https://hg.mozilla.org/integration/gaia-central/rev/0e58aeebf984
Author: Guillaume C. Marty <edo999@gmail.com>
Desc: Merge pull request #21047 from gmarty/Bug-1027373-FTU-Alphabet-picker-does-not-function-NEW

Bug 1027373 - [B2G][Flame][FTE] Alphabet picker does not function

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https://hg.mozilla.org/integration/gaia-central/rev/6de4eda02e65
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1027373 - [B2G][Flame][FTE] Alphabet picker does not function

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https://hg.mozilla.org/integration/gaia-central/rev/8c5106824a68
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #21184 from lanahuong/Bug_1032166

Bug 1032166 Follow up to bug 959201 with tests. r=steveck-chung

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https://hg.mozilla.org/integration/gaia-central/rev/e5536f4c9d55
Author: Lana Scravaglieri <lana.scravaglieri@gmail.com>
Desc: Bug 1032166 Follow up to bug 959201 with tests
Bumping manifests a=b2g-bump