Add tests for gogf/gf/database/gdb

Author: egregius313

go/ql/test/library-tests/semmle/go/dataflow/flowsources/local/database/test_gogf_gf_database_gdb.go

@@ -0,0 +1,17 @@
+package test
+
+import (
+	"fmt"
+
+	"github.com/gogf/gf/database/gdb"
+)
+
+func gogf(g gdb.DB) {
+	u1, err := g.GetOne("SELECT user from users") // $source
+
+	if err != nil {
+		return
+	}
+
+	fmt.Println(u1)
+}