prebuilts: Sync with axDev toolchain 4.8-2013.08

BINUTILS=upstream
CLOOG=0.18.0
PPL=1.0.x
GCC=4.8
GDB=7.6
GMP=5.1.2
MPFR=3.1.2
MPC=1.0.1
ISL=0.12.1

HOST GCC=4.8

Change-Id: I8fbf04d03cc8ddca4851932cb92e2312a3283c8e