Update qemu to version 2.6

Update qemu to version 2.6

This patch update qemu to version 2.6
For changelogs see:
http://wiki.qemu.org/ChangeLog/2.5
http://wiki.qemu.org/ChangeLog/2.6

Qemu try to built with bluez, but before version 2.6 bluez was not used
by qemu on IPFire, so I think it is better to disable bluez because
nobody needs it before version 2.6 and our bluez  is not the latest
version so I think this will cause more problems than benefits.

Signed-off-by: Jonatan Schlag <jonatan.schlag@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>