Force the use of 32-bit toolchain binaries on 64-bit systems.
This is used to reduce the number of distributable prebuilt packages
(i.e. linux-x86_64 is not needed anymore).

Also fix build/tools/build-toolchain.sh to properly copy the GPL and LGPL
license files into the generated prebuilt packages.

Also add a .gitignore files to get less spew from 'git status'
7 files changed