build: generate def file when building with mingw
build: generate def file when building with mingw

bestwpw/libsoundio,bestwpw/libsoundio,andrewrk/libsoundio,shaunstanislaus/libsoundio,adrian-stepien/libsoundio,davidgranstrom/libsoundio,vanloswang/libsoundio,adrian-stepien/libsoundio,tresf/libsoundio,tresf/libsoundio,gityf/libsoundio,tmatth/libsoundio,gityf/libsoundio,shaunstanislaus/libsoundio,weizhiwu/libsoundio,island-org/libsoundio,WilliamRen/libsoundio,andrewrk/libsoundio,weizhiwu/libsoundio,davidgranstrom/libsoundio,island-org/libsoundio,vanloswang/libsoundio,WilliamRen/libsoundio,tmatth/libsoundio