RFR(L): 8161259: Simplify including platform files.

[Kim Barrett]

> On Jul 15, 2016, at 8:17 AM, Lindenmaier, Goetz <goetz.lindenmaier at sap.com> wrote:
> 
> Hi,
> 
> I made a new webrev:
> - '_' is added in makefile
> - uses Kim's macros
> - macros are capitalized
> - more comments in macros.hpp
> http://cr.openjdk.java.net/~goetz/wr16/8161259-newPfmIncl/webrev.02/

Updated macrology looks good.

I won’t be able to review the rest any time soon, so don’t wait for me.