internals: fix stripping canadians

We can't run the newly built gcc when it is a canadian cross.
Thus, we can't get the version number, and thus we can't get
the directory libexec subdirectory to strip.

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

# Linux kernel options

config KERNEL_linux

    select KERNEL_SUPPORTS_SHARED_LIBS

    help

      Build a toolchain targeting systems running Linux as a kernel.