binutils/binutils: do not fwd declare struct stat (2.22).

For canadian cross to host i686-mingw32 fwd declaring
struct stat is not possible.
Instead #include <sys/stat.h>

Signed-off-by: Titus von Boxberg <titus@v9g.de>
Message-Id: <417a15d4277913841ddd.1353100974@tschetwerikow.boxberg.lan>
Patchwork-Id: 199733

 reporter_name="Ioannis E. VENETIS"

 reporter_url="http://sourceware.org/ml/crossgcc/2009-11/msg00109.html"

 reporter_comment=""