Log Message:
Update cpuflags to 0.75
  - all:
    Implement 'cpuflags -v' which indicates the values used to determine flags
    Sync the latest fixup options for older gccs
  - cpuflags.NetBSD:
    Use -march=pentium3m and -march=pentium4m for gcc 3.4.x
    Set -mcpu=hypersparc for RT620/625 and -mcpu=cypress for L64811
  - cpuflags.Linux:
    Handle two different Celeron cases (thanks to Marc Recht & Jeremy C. Reed)