cc/gcc: do not print multilib for canadian-cross

Previous import from patchwork missed one hunk (in cset #d8feb93b3e49)
Apply it now.

Signed-off-by: "David Holsgrove" <david.holsgrove@xilinx.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Patchwork-Id: 189053

 reporter_name="Gustavo Zacarias <gustavo@zacarias.com.ar>"

 reporter_url="http://sourceware.org/ml/crossgcc/2011-03/msg00028.html"

 reporter_comment=""