Bumping gaia.json for 4 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/febb15805a42
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #11574 from ian-liu/clock/Bug901018_minute_is_undefined_when_creating_alarm_when_time_is_minutes_0-9

Bug 901018 - JavaScript Error: 'minute is undefined' when creating alarm when time is minutes 0-9, r=rwaldron

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https://hg.mozilla.org/integration/gaia-central/rev/c812b03e71f1
Author: ian-liu <iliu@mozilla.com>
Desc: Bug 901018 - JavaScript Error: 'minute is undefined' when creating alarm when time is minutes 0-9

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https://hg.mozilla.org/integration/gaia-central/rev/b4e831a9934f
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #11602 from alivedise/bugzilla/894835_master/inline-activity-oom

Bug 894835 - Don't remove activities when background app is crashed. r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/f7568eabb5b5
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 894835 - Don't remove activities when background app is crashed.