Log Message:
Update to 1.3.1. Changes since 1.3.0:

Adam Jackson (2):
      Uninclude xf86Version.h
      Make ISA optional

Dave Airlie (1):
      trident 1.3.1

Julien Cristau (1):
      Link with -lm for sin()

Paulo Cesar Pereira de Andrade (1):
      Correct macro IsPrimaryCard to check HAVE_ISA.