Building spec benchmarks with newer libstdc++

This post is mostly for the sake of others searching with the same problem.

I was having issues building the 483.xalancbmk benchmark with a not-so-new libstdc++ (4.3.4). There's a particular source file (FormatterToHTML.cpp) that uses memset without including string.h or cstring. This was the error message:

FormatterToHTML.cpp:139: error: 'memset' was not declared in this scope

It depended on an include of 'vector' to pull in 'cstring' as a transitive dep. That seems to have changed. Since the SPEC benchmarks go so far as to checksum the benchmark sources before letting you run them, it was easier to add '#include <cstring>' to /usr/include/c++/4.3.4/vector than fix the application. =(