msm8660-common: add checks for the minimum radio version

  * add script to determine the radio version and compare to a list of
    minimum acceptable versions (run from within recovery)
  * assumes the regexp ^SGH-MODEL$ is the model within the radio firmware
  * assumes the regexp ^MODEL[A-Z]{4,5}[A-Z1-9]$ is the version string
    within the radio firmware
  * add baseband assertion check to releasetools

Change-Id: I3f8c2d71d9315b07ff3199c7f037fd73e1861b9e