Trivial comment fix in mojo/public/cpp/system/macros.h.
Trivial comment fix in mojo/public/cpp/system/macros.h.

I meant to include this in my last CL, but I forgot to save. Oops.

TBR=kulakowski@chromium.org

Review URL: https://codereview.chromium.org/1205663003.

afandria/mojo,jianglu/mojo,afandria/mojo,jianglu/mojo,chinmaygarde/mojo,afandria/mojo,afandria/mojo,chinmaygarde/mojo,jianglu/mojo,jianglu/mojo,chinmaygarde/mojo,afandria/mojo,chinmaygarde/mojo,jianglu/mojo,afandria/mojo,chinmaygarde/mojo,chinmaygarde/mojo,jianglu/mojo,afandria/mojo,jianglu/mojo,jianglu/mojo,chinmaygarde/mojo,chinmaygarde/mojo,chinmaygarde/mojo,afandria/mojo