egcs1.0.2 + libg++ cross build failure

[Jim Wilson]

	This is the exact same problem that I reported a few weeks ago.
	The build of GCC requires some of the header supplied by newlib to
	determine the sizes of basic types, e.g. scan-types.sh.

This is trivial to workaround.  Don't run scan-types.sh.  It isn't needed when
using newlib.

	 He mentioned that the
	Cygnus development version of GCC "... only runs scan-types.sh if
	SYSTEM_HEADER_DIR exists which only occurs if --with-headers option was
	used [to configure the tree]."

Yes, this is one of the cross-compiler related patches that we need to merge
from the Cygnus gcc sources into the EGCS gcc sources.  It is on my list of
things to do, but I don't know when I will get around it.

Jim