It's useful to know which device was used if/when it fails.
channel-win32.c had this since 2015, with
c69403fcd4a0cb89f838a212ab71e4a1a3464c95 ("qemu-ga: debug printouts to
help troubleshoot installation"), this brings channel-posix.c up to
speed.
Signed-off-by: Bjørn Forsman <bjorn.forsman@gmail.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>