tools: dump_database: add const qualifier
tools: dump_database: add const qualifier

Signed-off-by: Jim Huang <b1c8ad271908ab342ec80ca4c319b7e9f508b5b3@gmail.com>

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