"core/git@repo.buzztime.com:halo/build.git" did not exist on "c639c787a0932b230be0d991941ce26c0faea81b"
Lunch: don't use a toolchain that doesn't exist.
Raphael Moll authored
"lunch sdk-eng" on cygwin tries to use a gcc.exe from the
prebuild arm toolchain, but it doesn't exist. This prevents
from setting variables to point on a gcc toolchain if there
is none for the given arch.

Change-Id: I3b72220663687f9fdaacc050899aef00632f2c3c
c639c787