base.bbclass: use os.path.normpath instead of just comparing WORKDIR and S as strings
* cannot use os.path.samefile, because S/B might not exist at this time yet
* there is issue with PSEUDO_IGNORE_PATHS when some recipe sets e.g.
S = "${WORKDIR}/"
whole WORKDIR gets added to PSEUDO_IGNORE_PATHS and then the build
can fail with various strange errors, in my case do_package was
failing when do_package calls:
fix_perms(.../1.0-r0/package/etc, 755, 0, 0, /etc)
and fails with "[Errno 1] Operation not permitted:"
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
