tree 4933e8835001c88c29bc8dc1f6495cd2ea28c774
parent cb0a741846492a50f48f1935d5db1e8f978629de
author Andrew Scull <ascull@google.com> 1540562164 +0100
committer Andrew Scull <ascull@google.com> 1541599437 +0000

Make better use of toolchains in the build.

This allows building for different platforms without having to retarget
the build. The configuration is also better checked by the assertions in
the toolchain templates.

A future change will redirect the root build rule to allow BSPs to
fully control their own build and configuration.

Change-Id: Iaae725d3bd000bc0ce7b9ef0f8f083350a73bd16