added uboot to local.mk
changed ccache version and patch
enabled taskset in busybox
added ppc linux and uboot projects override source dirs
ARC: [eznps] make cc1 use static libraries

cc1 can use now static version of mpc,mpfr,gmp
This enable moving toolchain without setting LD_LIBARARY_PATH

Signed-off-by: Noam Camus <noamc@ezchip.com>