cc/gcc: Update gcc to 4.7.1 (v2)

Attempt #2 at updating gcc.
This time without porting gcc 4.7.0 patches forward.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
Message-Id: <aeffa57986d52dd7b0a8.1341290304@flambe.is-a-geek.org>

reporter_name="Ioannis E. VENETIS"

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

reporter_comment=""