Add pppd build shell script and patches

guowenxue

2020-08-21 e9b63ad24536b3cd6e0b2721f2596e1bf9bccab7

linux-bsp/tarballs/linux-3.0.tar.bz2 does not exist in tree 6df449209bf50410b96092609c1117449e2ddfb2