toolchain/toolchain-wrapper.c: extend the list of unsafe paths

toolchain/toolchain-wrapper.c: extend the list of unsafe paths

On some legacy systems, the X11 headers and libs are in /usr/X11R66/include
and /usr/X11R66/lib, and of course, some packages are trying to be smart
and use those paths (even when they do not exist).

Add those to the list of unsafe paths to check in the toolchain wrapper.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>