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

========

https://hg.mozilla.org/integration/gaia-central/rev/18bf2612187b
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Merge pull request #26905 from RickyChien/bug-1112490

Bug 1112490 - Parallel build should output a make error r=@cctuan

========

https://hg.mozilla.org/integration/gaia-central/rev/8599f609fba7
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Bug 1112490 - Parallel build should output a make error

========

https://hg.mozilla.org/integration/gaia-central/rev/d0e0c81e056d
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Merge pull request #25948 from millermedeiros/1084014-month-view-day-observer

Bug 1084014 - [Calendar] update Month view to use DayObserver r=gaye

========

https://hg.mozilla.org/integration/gaia-central/rev/061255136be9
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 1084014 - [Calendar] update Month view to use DayObserver
Bumping manifests a=b2g-bump