cc/gcc: hide Linaro options by default

It can be quite confusing for a new-comer to find strange
version numbers for gcc, so hide the Linaro versions by
default.

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

 reporter_name="Harold Grovesteen"

 reporter_url="http://sourceware.org/ml/crossgcc/2009-11/msg00052.html"

 reporter_comment=""