Log Message:
Updating math/p5-Math-GMP from 2.05 to 2.06

pkgsrc changes:
  - Adding license definition

Upstream changes:
2.06  2009-09-17 Greg
    - Make Makefile.PL more forgiving of gmp library locations. (CPAN bug #46323)
    - Update link to libgmp.org in INSTALL file (CPAN bug #46324)