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

========

https://hg.mozilla.org/integration/gaia-central/rev/7ec4d2496a17
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24413 from makotokato/text-selection-value-selector

Bug 1072759 - [Text Selection] text_selection should handle value-select...

========

https://hg.mozilla.org/integration/gaia-central/rev/650d1844fb70
Author: Makoto Kato <m_kato@ga2.so-net.ne.jp>
Desc: Bug 1072759 - [Text Selection] text_selection should handle value-selector-shown event. r=alive

========

https://hg.mozilla.org/integration/gaia-central/rev/f313e9447b5e
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24523 from punamdahiya/Bug1072013

Bug1072013-[Video]-Opening the video app or tapping the camera icon will cause a white screen transition r=hub

========

https://hg.mozilla.org/integration/gaia-central/rev/651ca13fbf78
Author: Punam Dahiya <punamdahiya@yahoo.com>
Desc: Bug1072013-[Video]-Opening the video app or tapping the camera icon will cause a white screen transition r=hub
Bumping manifests a=b2g-bump