Bug 988277 - Update repo frontend to 1.21. r=mwu
Bug 1004331 - Handle unexpected excess files in get_about_memory.py
Bug 1004342 - Fix get_about_memory.py crash when printing timeout error message.

The operator for combining sets is `|`, not `+`.
Merge pull request #341 from jld/about-memory-set-union

Bug 1004342 - Fix get_about_memory.py crash when printing timeout error message. r=dhylands
Merge pull request #342 from jld/about-memory-excess-files

Bug 1004331 - Handle unexpected excess files in get_about_memory.py. r=dhylands
Merge pull request #334 from gcp/master

Bug 988277 - Update repo frontend to 1.21. r=mwu
Bug 1007566 - Assert that the /system partition is rw mounted r=gsvelto
Merge pull request #345 from lissyx/bug1007566

Bug 1007566 - Assert that the /system partition is rw mounted r=gsvelto
Bug 1008094 - Add device and gonk version checks to FOTA