sys-fs/multipath-tools: Version bump 0.6.4

sys-fs/multipath-tools: Version bump 0.6.4

Gentoo-bug: 604228

* Include patch for sysmacros
* Remove patch for makefile (building still performs a few unnecessary
  operations, but the cost is negligible compared to the cost of
  carrying yet another patch.
* Remove COMMIT_ID
* Remove some unnecessary definitions
* Include a way to disable ceph when building
* Add linux-info to check for CONFIG_DM_MULTIPATH

Package-Manager: Portage-2.3.3, Repoman-2.3.1
(cherry picked from commit ef97e67d7cb4b009af471dd2fafdf463960a909d)
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>