Update parrot from version 2.9.1 to 2.10.1.

Pkgsrc changes:
o Copy FreeBSD's method to determine physical memory (fixed upstream
  in later versions)
o Adapt to changes in the installed contents.

Upstream changes:

- Core
+ We are on github now! https://github.com/parrot/parrot
+ Configure, build and test subsystems were made Git-aware
+ New parrot_config key 'osvers' which contains
  Operating System Version information
+ Updated to the latest nqp-rx
+ A proper exception is now thrown on IO read errors
+ Garbage Collector optimizations and memory leak fixes
+ Deprecated charset ops were removed
+ Configure system learned to detect IPv6
+ The mk_language_shell and create_language scripts have not yet been
  ported to Git.
- Documentation
+ How To Use Git to work on Parrot
  https://github.com/parrot/parrot/blob/master/docs/project/git_workflow.pod
+ Git Terminology
  https://github.com/parrot/parrot/blob/master/docs/project/git_terminology.pod
- Platforms
- Testing
+ Increased coverage on: String, FixedBooleanArray, PMCProxy, LexPad
- Community
+ Macports portfile updated to 2.6.0
+ A Fedora package for PL/Parrot ( postgresql-plparrot ) was created
  This package allows you to write stored procedures for PostgreSQL in
  PIR or Rakudo Perl 6    http://pl.parrot.org
+ Parrot Foundation is teaming up with The Perl Foundation and taking
  part in Google Code-In 2010.

(he)