pass down board info to cros_setup_toolchains

If the board we're building includes extra toolchains that aren't part
of our official set, we need to make sure cros_setup_toolchains still
tries to set them up for us.

BUG=None
TEST=`cbuildbot chromiumos-sdk` works
TEST=`./setup_board --board=x32-generic` installs an extra toolchain

Change-Id: I85f70177f82bdf295eb2cd8668a031317a3b6e61
Reviewed-on: https://gerrit.chromium.org/gerrit/24336
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Zdenek Behan <zbehan@chromium.org>
Commit-Ready: Mike Frysinger <vapier@chromium.org>
2 files changed