Fix "apitrace trace" when running from installed location.
Fix "apitrace trace" when running from installed location.

A missing path separator was causing the wrapper library to fail to be found.

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