Improved code optimization by default

ref: http://www.sqlite.org/footprint.html

Author: denji

sqlite3.go

@@ -7,7 +7,8 @@ package sqlite3
 
 /*
 #cgo CFLAGS: -std=gnu99
-#include <sqlite3.h>
+#cgo CFLAGS: -Os
+#include "sqlite3.h"
 #include <stdlib.h>
 #include <string.h>