Merge remote-tracking branch 'remotes/pmaydell/tags/pull-bsd-user-20140611' into staging

bsd-user queue:
 * build fixes
 * improvements to strace

# gpg: Signature made Wed 11 Jun 2014 15:23:40 BST using RSA key ID 14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"

* remotes/pmaydell/tags/pull-bsd-user-20140611:
  bsd-user: Fix syscall format, add strace support for more syscalls
  bsd-user: Implement strace support for thr_* syscalls
  bsd-user: Implement strace support for extattr_* syscalls
  bsd-user: Implement strace support for __acl_* syscalls
  bsd-user: Implement strace support for print_ioctl syscall
  bsd-user: Implement strace support for print_sysctl syscall
  bsd-user: GPL v2 attribution update and style
  bsd-user: add HOST_VARIANT_DIR for various *BSD dependent code
  exec: replace ffsl with ctzl
  vhost: replace ffsl with ctzl
  xen: replace ffsl with ctzl
  util/qemu-openpty: fix build with musl libc by include termios.h as fallback
  bsd-user/mmap.c: Don't try to override g_malloc/g_free
  util/hbitmap.c: Use ctpopl rather than reimplementing a local equivalent
  bsd-user: refresh freebsd system call numbers

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>