Michael Marineau 6e6a0a4967 toolchain_util: include repos.conf in bootstrap build environments
This is required for the eventual removal of `$PORTDIR` and
`$PORTDIR_OVERLAY` and ensures toolchain rebuilds/updates with
`./build_packages --nousepkg` don't erroniously try to use ebuilds from
`/usr/portage` inside of the SDK.

In order to fix up the build_toolchains script the crossdev overlay
needs to be setup properly, previously only setup_board did it.

Overall silences a lot of warnings and fixes an issue with crossdev:

    /usr/bin/emerge-wrapper: line 48: /eclass/toolchain-funcs.eclass: No such file or directory
    /usr/bin/emerge-wrapper: line 49: tc-arch: command not found
2015-04-01 16:30:37 -07:00
..
2014-12-17 14:52:04 -08:00