tools/winegcc: fix linker for Haiku

[Austin English]

See bug 20116.

-- 
-Austin
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diff --git a/tools/winegcc/winegcc.c b/tools/winegcc/winegcc.c
index ad4aeb7..71e2a3e 100644
--- a/tools/winegcc/winegcc.c
+++ b/tools/winegcc/winegcc.c
@@ -920,9 +920,13 @@ static void build(struct options* opts)
 
     if (!opts->nostdlib) 
     {
-	strarray_add(link_args, "-lm");
-	strarray_add(link_args, "-lc");
-    }
+#ifdef __HAIKU__
+	strarray_add(link_args, "-lroot");
+#else
+ 	strarray_add(link_args, "-lm");
+ 	strarray_add(link_args, "-lc");
+#endif
+     }
 
     spawn(opts->prefix, link_args, 0);
     strarray_free (link_args);