Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-2_0/rev/bb3577ee84f5
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1096839: add BMP support to shared/js/media/image_size.js to fix Gallery open activity

remove the now unused MAX_FILE_SIZE variable
Bumping manifests a=b2g-bump