Updated to latest release, 0.4.6. Added buildlink3.mk file (which groonga
can use after this package is imported into HEAD). No other pkgsrc changes
other than adding new files in PLIST. From Revision History:

Version 0.4.6 (5/28/2013)

 * Fixed a bug that caused major problems when training on half-width characters
 * Added "tags" as an output format, for when you don't need the original word

Version 0.4.5 (4/8/2013)

 * Fixed some compile errors, especially under clang

Version 0.4.4 (2/25/2013)

 * Major refactoring to make the code easier to read and improve compile time a little
 * Added the ability to select -out eda for compatibility with the Eda parser

Version 0.4.3 (2/4/2013)

 * Added the -wsconst option, making it possible to not segment some character types (e.g. "-wsconst D" prevents segmentation of digits)