Update COPYING to make it clear that crosstool-NG is part of the source of a toolchain.

/trunk/COPYING | 14 14 0 0 ++++++++++++++
1 file changed, 14 insertions(+)

 reporter_name="Alexander BIGGA"

 reporter_url="http://sourceware.org/ml/crossgcc/2008-07/msg00000.html"