Add files to board-msan. Adapted from board-mrg.
Remove unused packages related to the new Digistar product
Remove librouter.
It is necessary to create a clone of digistar librouter, and do a new library related to Digistar MSAN product.
Use toolchain embedded on PIB
Remove unused packages for now
Make linux dependent for Broadcom SDK
No toolchain links for now, use original kernel headers
Install static libraries (needed by Broadcom SDK)
SDK fixes

- Fix clean target
- Run make from systems/linux/user/ directory as documented
Add dependency in iptables
Further fixes to make SDK compilation stable

- Only install static libraries needed by the SDK
- Make build target PHONY
add cish and librouter clone to attend new MSAN router
fix/add hack about toolchain links and linux
remove libusb and MRG defines from .mk
add libusb and pam-tacplus;
static libpthread commented in toolchain.mk... conflict detected with libusb / dynamic libraries
change MRG to MSAN
add MSAN config in u-boot.mk
add MRG not set
fix static library related to broadcom sdk
remove wifi related packages