make compilation work on cygwin

src/fe-none/meson.build

@@ -1,12 +1,13 @@
 # this file is part of irssi
 
-executable('botti',
+fe_none_irssi = executable('botti',
   files(
     'irssi.c',
   ),
   include_directories : rootinc,
   implicit_include_directories : false,
   export_dynamic : true,
+  implib : true,
   link_with : [
     libconfig_a,
     libcore_a,
@@ -14,6 +15,9 @@ executable('botti',
   install : true,
   dependencies : dep
 )
+if need_dl_cross_link_main
+  dl_cross_irssi_main = [ fe_none_irssi ]
+endif
 
 # noinst_headers = files(
 #   'module.h',