Build other architectures

An advantage of a source based distro is that we can build other architectures to exercise the shared parts of the compiler in different ways.

Enable building of the standard OpenEmbedded Core architectures. Check the build time. Check any failures versus the corresponding FSF compiler.

Time. If reasonable, enable as part of the auto build.

We also want to start building some history on other architectures. Developers normally want one compiler across a project or organisation. Get some history to show that Linaro GCC doesn't add undue risk and can be used across an organisation no matter what the architecture.

Reporting and presenting this history is important. At the end of six months we want to say 'Found 0 bugs in X builds of Y architectures.'