tools/firewire: add userspace front-end of nosy

This adds nosy-dump, the userspace part of nosy, the IEEE 1394 traffic
sniffer for Texas Instruments PCILynx/ PCILynx2 based cards.  Author is
Kristian Høgsberg.

The files added here are taken from
git://anongit.freedesktop.org/~krh/nosy commit ee29be97 (2009-11-10)
with the following changes by Stefan Richter:
  - Parts pertaining to the kernel module removed from Makefile.
  - dist target removed from the Makefile.
  - Mentioned nosy-dump in the Kconfig help to nosy's kernel component.
  - Add copyright notice to nosy-dump.c.  This is a duplicate of the
    respective notice in the kernel component nosy.c except for a time
    span of 2002 - 2006, according to Kristian's git log.

"git shortlog decode-fcp.c list.h nosy-dump.[ch]" from nosy's git
repository:

Jonathan Woithe (1):
      Save logs on Ctrl-C

Kristian Høgsberg (11):
      Pull over nosy from mercurial repo.
      Remove some fields from default view, add logging feature.
      Use infinite time out for poll(), mark more detail fields.
      Fix byte ordering macro.
      Add decoding of iso data and lock packets.
      Add flag to indicate data length field.
      Add cycle start packet decoding, add --iso and --cycle-start flags.
      Distinguish between phy-packets and 0-length iso data.
      Fix transaction and stats view.
      Add simple AV/C decoder.
      Don't break down on big payloads.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Kristian Høgsberg <krh@bitplanet.net>

drivers/firewire/Kconfig

@@ -85,7 +85,8 @@ config FIREWIRE_NOSY
 	  Apple Power Mac G3 blue & white (onboard controller).
 
 	  To compile this driver as a module, say M here:  The module will be
-	  called nosy.
+	  called nosy.  Source code of a userspace interface to nosy, called
+	  nosy-dump, can be found in tools/firewire/ of the kernel sources.
 
 	  If unsure, say N.