Recover missing testsuite/tests/run-pass/substr.sf
Recover missing testsuite/tests/run-pass/substr.sf

zhiyuanshi/fcore,hkuplg/fcore,wxzh/fcore,xnning/fcore,hkuplg/fcore,hkuplg/fcore,zhiyuanshi/fcore,bixuanzju/fcore,wxzh/fcore,xnning/fcore,zhiyuanshi/fcore,bixuanzju/fcore,xnning/fcore,wxzh/fcore,bixuanzju/fcore