Do not pass -m3dnow to gcc.

The 3DNow! instruction set is not supported by Intel processors.
Although gcc will not likely emit 3DNow! instructions, it is
dangerous to permit 3DNow! instructions due to the fact that Intel
has never supported 3DNow! instructions.
Make DLL_about static.

DLL_about is tied to this translation unit; make it static.
Make this array static.
Merge pull request #1 from tj90241/master

Do not pass -m3dnow to gcc.