mplayer: Update mplayer to version 1.0rc2.

Closes #331.

- Remove patches applied upstream
 - Add updated avr32 patch from Hans-Christian Egtvedt.

Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Signed-off-by: Will Newton <will.newton@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>