Fix overlooked change from internal tree.
Fix problem with "rpmbuild -bs ..." builds on i686 systems.
Change kmodtool.* files to reflect their origin OS rather than an OS
they're meant to fix and make the README file hopefully clearer.
Abandon the use of $(or ...) gmake feature since it doesn't exist
in gmake-3.81 or earlier versions affecting RHEL4 and RHEL5 native
builds.