Log Message:
Update ragel to 6.6.

Ragel 6.6 - Dec 2, 2009
=======================
 -Applied a number of patches from Diego Elio 'Flameeyes' Pettenò. Should not
  be modifying the program's arguments. Problem raised by const correctness in
  gcc 4.4. Other const-correctness and include fixes provided.
 -Fixed improper allocation of checks in makeIncludePathChecks.
 -Fixed segfault when there are no machine instantiations.
 -Fixed wrong line directives. Line directives need to use the fileName stored
  in the InputLoc stuctures from the parse trees, not the root source file,
  otherwise actions in included files will have the wrong source file names
  associated with the text.
 -Made a number of build system improvements. We locate the DIST file using
  $srcdir and source it. It contains settings for build_parsers and
  build_manual. This allows the user of a dist to enable only one.
 -Added missing files to doc/Makefile.am and examples/Makefile.am.
 -Added checks for pdflatex and fig2dev is build_manual is on.
 -Use automake --foreign so we don't need to have INSTALL and NEWS present.
 -Ragel VIM syntax files should be specialized by host language. Updated the
  VIM syntax files.
 -Just discovered that $srcdir is available in the configure script for
  checking for the existence of a file created by dist-hook. This lets us write
  a test that knows the difference between a distribution tarball and something
  from the repos. The building of the parsers and the manual can now be
  automatically turned off in a make dist tarball.
 -Added examples to the dist. Added unicode2ragel.rb to EXTRA_DIST in contrib.
 -Moved unicode2ragel.rb to the contrib directory.