Using /home/worker is the build directory has a 30% talos performance
loss, because test machines has a /home mount directory.
MozReview-Commit-ID: 554IPMRWgzK
Bug 1374940 adds a MOZ_TOOLCHAINS environment variable with a list of
path@task-id strings, where task-id is corresponding to the (possibly
optimized) toolchain job, and path corresponding to the
toolchain-artifact defined for that toolchain job.
We want to use that to pull artifacts instead of tooltool packages.
Using /home/worker is the build directory has a 30% talos performance
loss, because test machines has a /home mount directory.
MozReview-Commit-ID: zehcGJrUQX
The toolchain build scripts are currently defining the tooltool
manifest they use on their own. We move the definitions to the
taskcluster job definitions to normalize on everything using that.
