bug#24486: 25.1; `dired-do-compress-to' needs to call `expand-file-name'

[Drew Adams]

This line of `dired-do-compress-to':

         (out-file (read-file-name "Compress to: "))

needs to be changed to this:

         (out-file (expand-file-name (read-file-name "Compress to: ")))

Otherwise, an output file name that is read as, say, ~/some/dir/foo.zip
ends up erroneously trying to do this, or similar:

zip I/O error: No such file or directory
zip error: Could not create output file 
(/cygdrive/d/some/path//some/dir/foo.zip)
                                                              ^^
                                                             NOTE

In GNU Emacs 25.1.1 (x86_64-w64-mingw32)
 of 2016-09-17
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --without-dbus --without-compress-install CFLAGS=-static'