typing: disable warnings for a couple of Windows specific attributes

Differential Revision: https://phab.mercurial-scm.org/D10870

mercurial/windows.py

@@ -202,7 +202,7 b' def get_password():'
     """
     pw = ""
     while True:
-        c = msvcrt.getwch()
+        c = msvcrt.getwch()  # pytype: disable=module-attr
         if c == '\r' or c == '\n':
             break
         if c == '\003':
@@ -211,8 +211,8 b' def get_password():'
             pw = pw[:-1]
         else:
             pw = pw + c
-    msvcrt.putwch('\r')
-    msvcrt.putwch('\n')
+    msvcrt.putwch('\r')  # pytype: disable=module-attr
+    msvcrt.putwch('\n')  # pytype: disable=module-attr
     return encoding.strtolocal(pw)