Update to the 20090519 snapshot of GCC 4.4.0
Extract SUFFIX from PORTVERSION. Use SUFFIX for TARGLIB (and thus for
the library path used by this port). Also use SUFFIX for the libexec
directory instead of the full port version and flatten the directory
structure and simplify the logic along the way.
Make the determination of CONFIGURE_SCRIPT more robust.
Adjust Makefile header; nothing really left from the original.