Fix Config File Machinery

[insertinterestingnamehere]

There's currently some old broken machinery for generating a config file with defines that are set at CMake configure time. That header is no longer included anywhere. It should be fixed and used to provide info about how Galois is configured. Specifically, it should be used to provide:

• version information
• the type of aborts used inside the lockable type in the Galois shared object.

Both of those things are currently set as compiler flags in our current CMakeLists, but we shouldn't expect downstream users of an installed library to be aware of the flags used to compile it. That information needs to be included in an installed config header so they can check things with #ifdef statements. This is especially important for our operator aborting code because the headers currently will assume exception based aborts by default even though the library builds with setjump/longjump based aborts by default.

[insertinterestingnamehere]

The generated config header should also have compiler-specific macros that enable us to silence warnings in a targeted way. Currently we're doing this with compiler flags, but those options aren't automatically carried to end users.

[insertinterestingnamehere]

With the warnings overhaul, we need to remember to check if the Intel diagnostics we set manually are even needed anymore now that we use the more stringent warning flags.