configure: s/don't/do not/

The autoconf manual suggests not to use ' in messages.

I don't why they do, but it breaks syntax-highlighting.

Just remove the lone quote we have.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

python

import sys

sys.path.insert(0, '@@PREFIX@@/share/gcc-@@VERSION@@/python')

from libstdcxx.v6.printers import register_libstdcxx_printers

register_libstdcxx_printers (None)

end