Update lldb for clang/llvm 3.4 import

This commit largely restores the lldb source to the upstream r196259
snapshot with the addition of threaded inferior support and a few bug
fixes.

Specific upstream lldb revisions restored include:
   SVN      git
  181387  779e6ac
  181703  7bef4e2
  182099  b31044e
  182650  f2dcf35
  182683  0d91b80
  183862  15c1774
  183929  99447a6
  184177  0b2934b
  184948  4dc3761
  184954  007e7bc
  186990  eebd175

Sponsored by:	DARPA, AFRL
Give the fdt helper routines static linkage since no global definition
of them is provided anywhere.  (gcc was nice enough to warn about this,
clang didn't for some reason.)
In sys/dev/usb/controller/uss820dci.c, similar to r261977, fix a warning
about uss820dci_odevd being unused, by adding it to the part that
handles getting descriptors.

Reported by:	loos
Reviewed by:	hselasky
MFC after:	3 days
Adjust USB quirk.

MFC after:	1 week
Submitted by:	Volodymyr Kostyrko <arcade@b1t.name>
Our quirk table is almost full. Add some room for more quirks.

MFC after:	1 week
test_eagain_*_* should've been using nonblocking sockets instead of
blocking sockets.  The error was not exposed as long as the kernel
suffered from PR kern/185812.  Now corrected, these tests pass on
DragonFlyBSD 3.6.0.

PR:		kern/185812
Sponsored by:	Spectra Logic Corporation
MFC after:	2 weeks
Add $FreeBSD$.

MFC after:	1 week
Remove the 3rd clause ("advertising clause") of the BSD license as
permitted by the University of Berkeley on July 22, 1999.

Reviewed by:	imp
MFC after:	1 week
Use spinlocks to lock accesses to the vioapic.

This is necessary because if the vlapic is configured in x2apic mode the
vioapic_process_eoi() function is called inside the critical section
established by vm_run().
Handle writes to the SELF_IPI MSR by the guest when the vlapic is configured
in x2apic mode. Reads to this MSR are currently ignored but should cause a
general proctection exception to be injected into the vcpu.

All accesses to the corresponding offset in xAPIC mode are ignored.

Also, do not panic the host if there is mismatch between the trigger mode
programmed in the TMR and the actual interrupt being delivered. Instead the
anomaly is logged to aid debugging and to prevent a misbehaving guest from
panicking the host.
In ue_attach_post_task(), initialize curvnet to vnet0 before calling if_attach().
Before this patch, curvnet was NULL.
When the VIMAGE kernel option is enabled, this eliminates
kernel panics when USB ethernet devices are plugged in.

PR: 183835
Submitted by: Hiroo Oono <hiroo.ono at gmail dot com>
Tweak the handling of PCI capabilities in emulated devices to remove
the non-standard zero capability list terminator.   Instead, track
the start and end of the most recently added capability and use that
to adjust the previous capability's next pointer when a capability is
added and to determine the range of config registers belonging to
PCI capability registers.

Reviewed by:	neel
A first pass at adding support for injecting hardware exceptions for
emulated instructions.
- Add helper routines to inject interrupt information for a hardware
  exception from the VM exit callback routines.
- Use the new routines to inject GP and UD exceptions for invalid
  operations when emulating the xsetbv instruction.
- Don't directly manipulate the entry interrupt info when a user event
  is injected.  Instead, store the event info in the vmx state and
  only apply it during a VM entry if a hardware exception or NMI is
  not already pending.
- While here, use HANDLED/UNHANDLED instead of 1/0 in a couple of
  routines.

Reviewed by:	neel
two small changes:
- intercept FIONBIO and FIOASYNC ioctls on netmap file descriptors.
  libpcap calls them to set non blocking I/O on the file descriptor,
  for netmap this is a no-op because there is no read/write,
  but not intercepting would cause fcntl() to return -1
- rate limit and put under netmap.verbose some messages that occur
  when threads use concurrently the same file descriptor.
enable rfc1323 and rfc1644 by default in picobsd images.
I disabled it some 15 years ago but it is useful to have them on
when doing tcp throughput tests.
Fix incorrect assertions.
Add more __BEGIN_DECLS / __END_DECLS to <sys/capability.h>.

capability.h currently only wraps some of its declarations in __BEGIN_DECLS/__END_DECLS, so cap_enter(), cap_sandboxed(), etc. are usable from C++ code but cap_rights_init(), cap_rights_is_valid() etc. are not. This commit fixes this distinction.

Approved by:	rwatson (mentor)
MFC after:	1 week
Sponsored by:	DARPA, AFRL
Add a check to validate that memory BARs of passthru devices are 4KB aligned.

Also, the MSI-x table offset is not required to be 4KB aligned so take this
into account when computing the pages occupied by the MSI-x tables.
Fix mismerge in r262121

A break statement was lost in the merge.  The error had no functional
impact, but restore it to reduce the diff against upstream.
Remove an unnecessary header.

Reported by:	nwhitehorn
Approved by:	adrian (mentor, implicit)