loongson/mirror: links for sudokustudylib

loongson/mirror SudokuStudyLib-1.0.7.zip
loongson/mirror SudokuStudyLib-1.0.6.zip
loongson/mirror SudokuStudyLib-1.0.5.zip
loongson/mirror SudokuStudyLib-1.0.4.zip
loongson/mirror SudokuStudyLib-1.0.3.zip