redhat: package libuafs perl bindings

redhat: package libuafs perl bindings

Require the swig package as a build dependency. Build and package the
libuafs perl bindings.  Place these libraries in the openafs-devel
package, along with the man page (moved from the openfs-client package).

This fixes an rpm build error when the swig package is present on the
build system,

    RPM build errors:
    Installed (but unpackaged) file(s) found:
    /usr/lib64/perl/AFS/ukernel.pm
    /usr/lib64/perl/ukernel.so

FIXES 134470

Change-Id: Ifa8a0938f0c16e6099cd2923a71dd6466052a4d8
Reviewed-on: https://gerrit.openafs.org/12919
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>