Bumping gaia.json for 4 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/5108e87e962b
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #13392 from bobsilverberg/v1.2935041

Bug 935041 - Investigate test_sms_add_contact failure, resolve and re-enable the test

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https://hg.mozilla.org/integration/gaia-1_2/rev/a91668cac961
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 935041 - Investigate test_sms_add_contact failure, resolve and re-enable the test

Conflicts:
	tests/python/gaia-ui-tests/gaiatest/apps/contacts/app.py
	tests/python/gaia-ui-tests/gaiatest/tests/functional/messages/test_sms_add_contact.py

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https://hg.mozilla.org/integration/gaia-1_2/rev/5cdca0abd9e8
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #13451 from bobsilverberg/935044

Bug 932725 - Add a test to check that the "dial" activity is working, a=test-only

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https://hg.mozilla.org/integration/gaia-1_2/rev/edfb627d243a
Author: Teodosia Pop <teodosia.pop@gmail.com>
Desc: Bug 932725 - Add a test to check that the "dial" activity is working, a=test-only