add stack extension for Cygwin
add stack extension for Cygwin

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