We don't DEPEND on binutils for ansidecl.h so ensure we should never
use the header. This makes builds determinstic and means something like:
bitbake binutils
bitbake libxml2 -c configure
bitbake binutils -c clean
bitbake libxml2
doen't fail to build.
(From OE-Core rev: fe6cabfb0c6f382ef6131e07437b90c2afbf5488)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>