MFC r265925:

Upgrade our copy of llvm/clang to 3.4.1 release.  This release contains
mostly fixes, for the following upstream bugs:

http://llvm.org/PR16365 http://llvm.org/PR17473 http://llvm.org/PR18000
http://llvm.org/PR18068 http://llvm.org/PR18102 http://llvm.org/PR18165
http://llvm.org/PR18260 http://llvm.org/PR18290 http://llvm.org/PR18316
http://llvm.org/PR18460 http://llvm.org/PR18473 http://llvm.org/PR18515
http://llvm.org/PR18526 http://llvm.org/PR18600 http://llvm.org/PR18762
http://llvm.org/PR18773 http://llvm.org/PR18860 http://llvm.org/PR18994
http://llvm.org/PR19007 http://llvm.org/PR19010 http://llvm.org/PR19033
http://llvm.org/PR19059 http://llvm.org/PR19144 http://llvm.org/PR19326
Remove vt.4.gz from ObsoleteFiles.inc that happily removes our shiny new
vt.4 man page.  It was in there from the removal of pcvt eight years
ago.

Approved by:	emaste
MFC after:	3 days
MFC 263949, 265063: Add library dependencies for a couple bootstrap libs
to fix build failures for high -jN values when building with gcc.
MFC r264879

Fix jailed raw sockets not setting the correct source address by
calling in_pcbladdr instead of prison_get_ip4.

Sponsored by:	Multiplay
MFC r264881

Add Linux socket call decoding to truss

Sponsored by:	Multiplay
MFC r264885

Eliminate duplicate checks in vdev_geom_io_intr error handling

Sponsored by:	Multiplay
MFC 266721:
Remove r264317 by accident.

Spotted by:	Kuan-Chung Chiu