tree 01cc848486e3074fb92c5cf0b43a589644462ef3
parent dc068b076221e5e5135d9edde8b909f732e0cef0
author Dan Willemsen <dwillemsen@google.com> 1500969458 -0700
committer Dan Willemsen <dwillemsen@google.com> 1501091362 -0700

Run `uname -sm` once, don't use python for HOST_OS_EXTRA

This saves 20-50ms for `lunch` (~7-10%), and double that for every build
execution.

Test: Check HOST_OS_EXTRA on Linux & Mac
Change-Id: I863200b2287c8867f40606237895b1d3ad91e1b3