Log Message:
The following combination of GNU/Altera nios2 tool-chain is newly added.
nios2          (just a Makefile.common)
nios2-binutils (2.20)
  Cross binutils for ALTERA FPGA Nios2 processor.
nios2-gcc
  Cross gcc-3.4.6 for ALTERA FPGA Nios2 processor.