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

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https://hg.mozilla.org/integration/gaia-1_4/rev/d3517680a612
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #19340 from nullaus/bug1003321

Bug1003321

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https://hg.mozilla.org/integration/gaia-1_4/rev/cf3eba248b0b
Author: crdlc <crdlc@tid.es>
Desc: Long press results in the [x] showing up on all icons except the one you long-pressed, which comes in later
(cherry picked from commit 6cc1fb26df82804235186de3a14bdaad16988471)

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https://hg.mozilla.org/integration/gaia-1_4/rev/c9688c472db9
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #19380 from viorelaioia/bug_1003175_xfail_test

Bug 1003175 xfail test

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https://hg.mozilla.org/integration/gaia-1_4/rev/facf12d5cf50
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Change xfail bug in test_cards_view_with_two_apps.py, as Bug 946130 is fixed
Bumping manifests a=b2g-bump