Log Message:
Update libhangul to 0.0.12.

0.0.12
 * add dubeolsik yetgeul keyboard
 * make sebeolsik yetgeul keyboard layout conform to HWP
 * add API to get builtin keyboard list
 * use Unicode jamo for incomplete syllable
 * gettextize
 * bug fix for Unicode 5.2
 * fix wrong characters in ahnmatae(#31548)
 * add command line tool hangul

0.0.11
 * fixed preedit string bug: #315256
 * added Ahnmatae method
 * updated hanja frequency data and reordered hanja table according to it:
   #315200
 * fixed bugs in hanja data
 * updated old hangul jamo combination table according to Unicode standard 5.2:
   #315127