Resolving symlinks to absolute paths with drive fail on Windows

[mrbean-bremen]

If creating a symlink to an absolute path in pyfakefs under Windows (Python 3 only) resolving the path fails.
For example:

    def testSymlink(self):
        self.filesystem.is_windows_fs = True
        self.filesystem.create_file(r'C:\foo\bar')
        self.filesystem.create_symlink(r'C:\foo\link', r'C:\foo\bar')
        self.assertTrue(self.filesystem.exists(r'C:\foo\link'))

fails because the path is resolved to C:\foo\C:\foo\bar instead of C:\foo\bar.