[mythtv] configure did not detect my cpu

[Jon Whitear]

With CVS as of 26th March-

*** WARNING ***
 Your CPU was not detected properly:
   uname -m: i686
   uname -p: Pentium III (Coppermine)
   model name: Pentium III (Coppermine)
   flags: fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36
mmx fxsr sse