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

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https://hg.mozilla.org/integration/gaia-central/rev/5703878185d4
Author: Salvador de la Puente González <salva@unoyunodiez.com>
Desc: Merge pull request #21862 from lodr/bug-1039984-smartcollections-and-homescreen

Bug 1039984 - [System] Trying to open a smartcollection after killing th...

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https://hg.mozilla.org/integration/gaia-central/rev/dc8c5d9df3c1
Author: Salvador de la Puente <salva@unoyunodiez.com>
Desc: Bug 1039984 - [System] Trying to open a smartcollection after killing the Homescreen do nothing.

Allow Homescreen application window to be killed as other windows. But
avoiding to be marked as _killed as, from a system app perspective, the
homescreen is never killed.

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https://hg.mozilla.org/integration/gaia-central/rev/fb44b8b6023f
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #21970 from gasolin/issue-1040676

Bug 1040676 - [System] Wrong 2.25x resource for Quick setting bluethooth...r=pavel

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https://hg.mozilla.org/integration/gaia-central/rev/a51012ca9771
Author: gasolin <gasolin@gmail.com>
Desc: Bug 1040676 - [System] Wrong 2.25x resource for Quick setting bluethooth on indicator

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https://hg.mozilla.org/integration/gaia-central/rev/e51498449283
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Merge pull request #21934 from acperez/bug-1040700

Bug 1040700 - Modify APN for ATT because last update doesn't work as expected. r=jaoo

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https://hg.mozilla.org/integration/gaia-central/rev/a2ba0f99da63
Author: Albert <alberto.crespellperez@telefonica.com>
Desc: Bug 1040700 - Modify APN for ATT because last update doesn't work as expected.r=jaoo
Bumping manifests a=b2g-bump