qemu/sh4-r2d: update to use kernel 3.2.12

Unfortunately kernel 3.3 doesn't seem to work properly at the moment.
So lock down headers to version 3.2.x and kernel to 3.2.12.
Tested on qemu 1.0.1

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>