add common temporary file patterns to .gitignore

Author: marten-seemann

.gitignore

@@ -4,10 +4,14 @@ main
 mockgen_tmp.go
 *.qtr
 *.qlog
+*.txt
+race.[0-9]*
 
 fuzzing/*/*.zip
 fuzzing/*/coverprofile
 fuzzing/*/crashers
 fuzzing/*/sonarprofile
 fuzzing/*/suppressions
 fuzzing/*/corpus/
+
+gomock_reflect_*/