Log Message:
As proposed at pkgsrc-users@,
  (1) nios2-gcc       3.4.6 renamed to nios2-gcc3
  (2) nios2-binutils  2.20  renamed to nios2-bintuils220
  (3) nios2-gcc41     4.1.2 is imported from wip
  nios2/Makefile.common, used be for (1) and (2) are
  now for (2) and (3).