Convert keymap file to UTF-8 encoding

Most QEMU files either are pure ASCII or use UTF-8.
Convert this keymap file which still used ISO-8859-1 to UTF-8.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

pc-bios/keymaps/is

-# 2004-03-16 Halldr Gumundsson and Morten Lange
+# 2004-03-16 Halldór Guðmundsson and Morten Lange
 # Keyboard definition file for the Icelandic keyboard
 # to be used in rdesktop 1.3.x ( See rdesktop.org)
 # generated from XKB map de, and changed manually