kbd: add brazil kbd keys to x11 evdev map

This patch adds the two extra brazilian keys to the evdev keymap for
X11.  This patch gets the two keys going with the vnc, gtk and sdl1
UIs.

The SDL2 library complains it doesn't know these keys, so the SDL2
library must be fixed before we can update ui/sdl2-keymap.h

Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>