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

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https://hg.mozilla.org/integration/gaia-central/rev/e39782250816
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #25573 from steveck-chung/message-unsupport-format

Bug 1090043 - [B2G][Message] MMS attachments missed in SMIL could not be displayed, r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/3f17c59f1551
Author: Steve Chung <schung@mozilla.com>
Desc: Bug 1090043 - [B2G][Message] MMS attachments missed in SMIL could not be displayed. r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/4d22dd22c765
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #25526 from mancas/bug1079218

Bug 1079218 - Warning not required when device has 2G connection and "ap... r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/dcf3f0524363
Author: Manuel Casas <manuel.casasbarrado@telefonica.com>
Desc: Bug 1079218 - Warning not required when device has 2G connection and "app.update.2g.enabled" = false and "app.update.wifi-prioritized" = true

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https://hg.mozilla.org/integration/gaia-central/rev/0fbcc846fa2a
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #24980 from mancas/bug1079215

Bug 1079215 - Invalid warning when user taps in update available with di.... r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/2d52ee0e81b0
Author: Manuel Casas Barrado <manuel.casasbarrado@telefonica.com>
Desc: Bug 1079215 - Invalid warning when user taps in update available with disabled wifi connection
Bumping manifests a=b2g-bump