Log Message:
ninja-build: updated to 1.12.0

v1.12.0
I've wrote a summary as an announcement to the ninja-build mailing list, but it \ 
seems to be stuck in the moderation queue - thank you Google Groups 😔. I'll \ 
update this if the mail ever sees the light of day.

https://github.com/ninja-build/ninja/milestone/6?closed=1