readme: Add a bit of text describing how to determine the graphics api used by a windows app.
readme: Add a bit of text describing how to determine the graphics api used by a windows app.

surround-io/apitrace,apitrace/apitrace,apitrace/apitrace,swq0553/apitrace,joshua5201/apitrace,schulmar/apitrace,apitrace/apitrace,schulmar/apitrace,swq0553/apitrace,tuanthng/apitrace,tuanthng/apitrace,apitrace/apitrace,joshua5201/apitrace,joshua5201/apitrace,trtt/apitrace,EoD/apitrace,trtt/apitrace,joshua5201/apitrace,EoD/apitrace,schulmar/apitrace,surround-io/apitrace,trtt/apitrace,swq0553/apitrace,trtt/apitrace,swq0553/apitrace,joshua5201/apitrace,schulmar/apitrace,EoD/apitrace,tuanthng/apitrace,trtt/apitrace,EoD/apitrace,swq0553/apitrace,tuanthng/apitrace,surround-io/apitrace,EoD/apitrace,surround-io/apitrace,surround-io/apitrace,schulmar/apitrace,tuanthng/apitrace