test-keyboard.c: Add const
test-keyboard.c: Add const

Signed-off-by: ChangZhuo Chen (陳昌倬) <3e17fff0ff5a2bf6a82b2512b82f435b16fabafb@gmail.com>

chewing/libchewing,yan12125/libchewing,robert501128/libchewing,robert501128/libchewing,dimotsai/libchewing,kito-cheng/libchewing,Chocobo1/libchewing,kito-cheng/libchewing,PeterDaveHello/libchewing,mangokingTW/libchewing,robert501128/libchewing,ShengYenPeng/libchewing,cwlin/libchewing,cwlin/libchewing,Chocobo1/libchewing,simonfork/libchewing,mangokingTW/libchewing,cwlin/libchewing,dimotsai/libchewing,yan12125/libchewing,cwlin/libchewing,robert501128/libchewing,dimotsai/libchewing,ShengYenPeng/libchewing,kito-cheng/libchewing,simonfork/libchewing,PingNote/libchewing,bbyykk/libtaigi,cwlin/libchewing,simonfork/libchewing,PingNote/libchewing,hiunnhue/libchewing,bbyykk/libtaigi,mangokingTW/libchewing,dimotsai/libchewing,PeterDaveHello/libchewing,ShengYenPeng/libchewing,ShengYenPeng/libchewing,hiunnhue/libchewing,yan12125/libchewing,chewing/libchewing,PeterDaveHello/libchewing,chewing/libchewing,PeterDaveHello/libchewing,Chocobo1/libchewing,kito-cheng/libchewing,bbyykk/libtaigi,bbyykk/libtaigi,PingNote/libchewing,PingNote/libchewing,Chocobo1/libchewing,mangokingTW/libchewing,yan12125/libchewing,hiunnhue/libchewing,hiunnhue/libchewing,simonfork/libchewing,hiunnhue/libchewing,bbyykk/libtaigi,chewing/libchewing,Chocobo1/libchewing