Do not keep the build.zig cache manifest file locked.
This allows to have multiple instances of `zig build` at the same
time. For example when you have a long running `zig build run` and
then want to run `zig build somethingelse`.
97692cb4feTimon Kruiper committed on 12/10/2020, 3:16:26 AM· committed by Andrew Kelleyparentd9c808e