make: remove some files from cpplint excludes

@tjfontaine I'm not a big fan of including a win32 system header in another header file that is included by several source files. However, because [tools/msvs/genfiles/node_perfctr_provider.h](https://github.com/joyent/node/blob/v0.12/tools/msvs/genfiles/node_perfctr_provider.h) is automatically generated, defines inline functions and uses types that can't be easily forward-declared, it's the best solution I can come up with if we want to remove `node_win32_perfctr_provider.cc` from `CPPLINT_EXCLUDE`.

I would say that's an acceptable trade-off, but I'd like to know what you think first.