patch applied (ghc-6.8/packages/hpc): Changing the API to readMix, allowing the ability to bypass the hash check.

[Ian Lynagh]

Fri Sep  7 22:12:47 PDT 2007  andy at galois.com
  * Changing the API to readMix, allowing the ability to bypass the hash check.

    M ./Trace/Hpc/Mix.hs -4 +10