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>

 reporter_name="unknown"

 reporter_url="http://iphonelinux.org/index.php/Glibc_toolchain_using_crosstool-NG"

 reporter_comment="An (experimental) toolchain targeting the Apple's iPhone."