remove SPAWN/SWITCHTOTHREAD for Cygwin
remove SPAWN/SWITCHTOTHREAD for Cygwin


aginika/EusLisp,wkentaro/EusLisp,bmagyar/EusLisp,aginika/EusLisp,wkentaro/EusLisp,bmagyar/EusLisp,bmagyar/EusLisp,aginika/EusLisp,wkentaro/EusLisp,aginika/EusLisp,wkentaro/EusLisp,bmagyar/EusLisp