Add crosstool-NG build to rockboxdev.sh.

rockboxdev.sh can now build toolchains using ct-ng (and build ct-ng before
if required). It downloads the appropriate config for ct-ng and lets it do its job.

Used for the upcoming YP-R0 target, which requires a full toolchain including libc.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31412 a1c6a512-1295-4272-9138-f99709370657
1 file changed