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

========

https://hg.mozilla.org/integration/gaia-central/rev/b4f77d39d6d8
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24773 from anefzaoui/bug-1011272

Bug 1011272 - [B2G][RTL][Dialer] Arabic: Call Log in Dialer app has multiple issues.

========

https://hg.mozilla.org/integration/gaia-central/rev/926ada821477
Author: Ahmed Nefzaoui <nefzaoui.ahmed@hotmail.com>
Desc: Bug 1011272 - [B2G][RTL][Dialer] Arabic: Call Log in Dialer app has multiple issues.

========

https://hg.mozilla.org/integration/gaia-central/rev/0765588ede06
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #25014 from eliperelman/bug-1080812

Bug 1080812 - Fixing performance test issue with screen timeouts

========

https://hg.mozilla.org/integration/gaia-central/rev/4524276dd2ae
Author: Eli Perelman <eli@eliperelman.com>
Desc: Bug 1080812 - Fixing performance test issue with screen timeouts
Bumping manifests a=b2g-bump