bpo-27645: Add support for native backup facility of SQLite (GH-4238)

diff --git a/Modules/_sqlite/module.c b/Modules/_sqlite/module.c
index 879c666..6befa07 100644
--- a/Modules/_sqlite/module.c
+++ b/Modules/_sqlite/module.c
@@ -323,6 +323,9 @@
 #if SQLITE_VERSION_NUMBER >= 3008003
     {"SQLITE_RECURSIVE", SQLITE_RECURSIVE},
 #endif
+#if SQLITE_VERSION_NUMBER >= 3006011
+    {"SQLITE_DONE", SQLITE_DONE},
+#endif
     {(char*)NULL, 0}
 };