Let codegen to write LF newlines on Windows

codegen2.py

@@ -39,7 +39,7 @@ def generate_library(classes, config, libname):
         is_rust = path.endswith('.rs')
         if libname:
             path = 'wx-%s/%s' % (libname, path)
-        with open(path, 'w') as f:
+        with open(path, 'w', newline='\n') as f:
             for chunk in generator(
                 rust_bindings if is_rust else cxx_bindings,
                 libname

gen_constants_rs.py

@@ -20,7 +20,7 @@
 # place wxWidgets doxygen xml files in wxml/ dir and run this.
 def main():
     outpath = 'wx-base/src/constants.rs'
-    with open(outpath, 'w') as f:
+    with open(outpath, 'w', newline='\n') as f:
         print(PROLOGUE, file=f)
         for file in xml_files_in('wxml/'):
             # print(file)