Add example using driverName

Author: mattn

_example/custom_driver_name/Makefile

@@ -0,0 +1,12 @@
+TARGET = custom_driver_name
+ifeq ($(OS),Windows_NT)
+TARGET := $(TARGET).exe
+endif
+
+all : $(TARGET)
+
+$(TARGET) : main.go
+	go build -ldflags="-X 'github.com/mattn/go-sqlite3.driverName=my-sqlite3'"
+
+clean :
+	rm -f $(TARGET)

_example/custom_driver_name/main.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"database/sql"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+func main() {
+	for _, driver := range sql.Drivers() {
+		println(driver)
+	}
+}