VEC re-write [patch 01/25]

[Hans-Peter Nilsson]

On Sat, 17 Nov 2012, Diego Novillo wrote:
> I have now committed all 25 parts of this patch as rev 193595.  Please
> CC me on any problems that you think may be related to this rewrite.

That seems to have trigged some bug in gcc-4.4-era.  See
PR55381.  There are a lot of suspicious warnings from vec.h.
It smells a bit like a host gcc bug, but I'll have to find a
newer version where it builds to confirm.  (If so, "hopefully"
it's as "simple" as upping the minimum host gcc version or
blacklisting gcc-4.4.x.)

brgds, H-P