copy qemu arm binary to buildfs postinst and remove it before removal
add ccache to build process by default; 5G size.
patch /etc/profile to automatically call ccache even if some ./configures don't use it by default
make patchfs() available to toolchain build scripts
add marker to fs 'tcver'
add scripts for populating and building a ccache
update funcs.sh to increase ccache size
add ccache population script to buildfs
add /opt/vc/lib.conf to the ld.so.conf.d
add support for export DISABLE_LOCAL_BUILDS to avoid circular dependency