[patch] substitute @tie{} with a space for the man pages

[Matthias Klose]

The gcc man page currently has untranslated @tie{} patterns in the man page.
Just replace these with a white space.  Ok for the trunk and branches?

Matthias

--- a/contrib/texi2pod.pl
+++ b/contrib/texi2pod.pl
@@ -210,6 +210,7 @@ while(<$inf>) {
     s/\@TeX\{\}/TeX/g;
     s/\@pounds\{\}/\#/g;
     s/\@minus(?:\{\})?/-/g;
+    s/\@tie\{\}/ /g;
     s/\\,/,/g;

     # Now the ones that have to be replaced by special escapes