Log Message:
Update uim to 1.8.4.
based on PR pkg/47468 by YAMASHIRO, Jun.

Overview of changes from 1.8.3 to 1.8.4
=======================================
* Enhancements
  - uim-xim
    * Add Hungarian locale support (by Kővágó Zoltán)
  - uim-tutcode
    * Enhance postfix katakana conversion
      - Take characters while hiragana continues
      - Exclude specified number of characters
      - Shrink last postfix katakana conversion
    * Updated trycode composition table retrieved 2012-11-22

Overview of changes from 1.8.2 to 1.8.3
=======================================
* Fixes
  - uim-toolbar-gtk-systray
  - uim-toolbar-gtk3-systray
    * Avoid SEGV in some environments ([uim-ja 337])
    * Fix typo ([uim-ja 339])

  - uim-tutcode
    * Fix bug: <Shift>left/right key erases current selection text
      on Google Chrome