Fix test for path::to_absolute() in Fedora 17
Fix test for path::to_absolute() in Fedora 17

Fedora 17 has made /bin a symlink to /usr/bin.  This broke our tests for
path::to_absolute() because we were relying on 'ls' to resolve to /bin/ls.
Perform a string match to workaround this, although this "solution" won't
be bullet-proof.

This change was r339 in Subversion.

jmmv/kyua,jmmv/kyua,rodrigc/kyua,rodrigc/kyua,jmmv/kyua,rodrigc/kyua,rodrigc/kyua,jmmv/kyua