Update libhdhomerun to 20140121.

Upstream changelog:
 - License changed to LGPL 2.1.
 - Improvements to socket handling on Mac/Linux.
 - Corrections to EU channel map.
 - Increase firmware upload chunk size.
Updated multimedia/libhdhomerun to 20140121
patch libhdhomerun to avoid arithmetic with void *
add a patch for CVE-2014-0191 aka http://secunia.com/advisories/58018/
from https://git.gnome.org/browse/libxml2/commit/?id=9cd1c3cfbd32655d60572c0a413e017260c854df
Update to 20140510
Fix PR pkg/48793: treat OpenBSD 5.4 or later as ELF platform
Patch from obache@, thank you.
Remove hack for OpenBSD
The problem should be fixed with PR pkg/48793.
Fall back to fixed (like elsewhere in the program) if helvetica is
missing, instead of bombing. Helps if people forget to install X
fonts, or if their native X fonts are messed up. PKGREVISION -> 8
xfrisk
Not MAKE_JOBS_SAFE, it appears.
Fix build failure on platforms where O_CLOEXEC is not available (e.g. MacOS X < 10.7)