qemu-char: add cyrillic key 'numerosign' to Russian keymap

qemu-char: add cyrillic key 'numerosign' to Russian keymap

numero sign is the number sign key of Russian keyboard layout, we
get this key with 'shift + 3'. It's missing in current Russian keymap file,
this patch fixes it.
As number sign does not exsit in Russian keyboard layout[1][2], this
patch also removes the 'numbersign' from Russian keymap.

[1] http://en.wikipedia.org/wiki/Keyboard_layout#Russian
[2] http://kbd-intl.narod.ru/english/layouts

Signed-off-by: Wang Xin <wangxinxin.wang@huawei.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>