Fix an infinite loop in grub-mkconfig

Fix an infinite loop in grub-mkconfig

* util/grub.d/10_hurd.in: Make kernel list progression not fail on
kernels whose paths contain regex metacharacters.
* util/grub.d/10_kfreebsd.in: Likewise.
* util/grub.d/10_linux.in: Likewise.
* util/grub.d/20_linux_xen.in: Likewise.

Reported by: Heimo Stranner.

Origin: upstream, http://git.savannah.gnu.org/gitweb/?p=grub.git;a=commitdiff;h=0901e7855f922e770cbfeb58262cb8fded518190
Last-Update: 2014-07-08

Patch-Name: mkconfig-kernels-infloop.patch