scrips/functions: fix downloads using curl

By default curl doesn't folow redirects. This breaks sourceforge downloads.
Add the -L option to curl to fix this.

Curl also downloads the html as a file even when it gets a 404. This breaks
http downloads when using the failback system. Add the -f option to curl to fix
this.

Signed-off-by: Richard Strand <richard.strand@icomera.com>

 --- binutils/ld/ldmain.c

 +++ binutils/ld/ldmain.c

 @@ -273,2 +273,5 @@ main (int argc, char **argv)

    link_info.emit_hash = TRUE;

 +#ifndef __mips__

 +  link_info.emit_gnu_hash = TRUE;

 +#endif

    link_info.callbacks = &link_callbacks;