tools/winegcc: support a trailing / in paths to winebuild

[Bernhard Loos]

On Mon, Aug 22, 2011 at 7:02 PM, Jerome Leclanche <adys.wh at gmail.com> wrote:
> That's to be fixed in bash-completion, not winegcc...

Uhm, what's wrong with bash-completation? -B takes a directory as an
argument so bash adds a slash during autocomplete, that's ok.
gcc itself can also deal with a trailing / for -B, it's kinda
suprising, if this breaks in winegcc.