Added dummy db update scripts, so the db upgrade script won't fail in future.

This is for the case when the db version is not correctly or missing in the user
database.

src/include/db_update_v0.txt

@@ -0,0 +1,5 @@
+-- New Database Structure Updates
+
+-- Insert data
+
+-- Updated Data

src/include/db_update_v1.txt

@@ -0,0 +1,5 @@
+-- New Database Structure Updates
+
+-- Insert data
+
+-- Updated Data

src/include/db_update_v7.txt

@@ -0,0 +1,5 @@
+-- New Database Structure Updates
+
+-- Insert data
+
+-- Updated Data