Fix screwing up build type flags.
Fix screwing up build type flags.

The description of the build type was wrong,
and none of this stuff needs to be set up anyway.

Check the warning flags before adding.

Don't use -mtune=native by default, since that will
probably end in tragedy for someone.

kyledewey/stp,kyledewey/stp,kyledewey/stp,kyledewey/stp,kyledewey/stp,kyledewey/stp