cmake: Fail glxtrace/egltrace link if there are missing symbols.
cmake: Fail glxtrace/egltrace link if there are missing symbols.

Note, this is already the default for wgltrace/cgltrace.

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