bug#13879: Change src/msdos.c from raw-text to ASCII

[Paul Eggert]

Tags: patch

In my attempt to make the Emacs sources UTF-8-safe, I ran across
src/msdos.c, which is currently raw-text because
it has string literals containing bytes with the top
bit set.  There's an easy way to make this ASCII, e.g.,
use the string literal "\375" rather than "X" (where X is
the actual byte with octal code 375).  Attached is a proposed patch.
I'm CC'ing this to Eli since this affects the MS-DOS port.

msdos.txt
Description: Text document