kpatch: do not rm selinux rpm owned directory

As part of the kpatch rpm package installation, the /var/lib/kpatch directory
gets created and is set to be selinux owned by the kpatch rpm package.

There is a problem where uninstalling the last kpatch-patch will also remove
this directory. When another kpatch-patch installation occurs, the
/var/lib/kpatch get recreated but withtout the selinux context which triggers a
policy error.

Since /var/lib/kpatch is now created by the rpm spec file, do not remove it
from the uinstall target of the kpatch script. This insures selinux context
consistency.

RHEL-only.

Signed-off-by: Yannick Cote <ycote@redhat.com>
--- a/kpatch/kpatch
+++ b/kpatch/kpatch
@@ -610,7 +610,6 @@ case "$1" in
 	echo "uninstalling $PATCH ($KVER)"
 	rm -f "$MODULE" || die "failed to uninstall module $PATCH"
 	rmdir --ignore-fail-on-non-empty "$INSTALLDIR/$KVER" || die "failed to remove directory $INSTALLDIR/$KVER"
-	rmdir --ignore-fail-on-non-empty "$INSTALLDIR" || die "failed to remove directory $INSTALLDIR"
 
 	;;