mpc: update to mpc-1.0.2

Signed-off-by: Stephan Raue <stephan@openelec.tv>
cloog: update to cloog-0.18.2

Signed-off-by: Stephan Raue <stephan@openelec.tv>
gcc: update configure options (inspired by CLFS)

Signed-off-by: Stephan Raue <stephan@openelec.tv>
busybox: double pciutils in depends