Test added that demonstrates wc.db schema corruption when column is added to the table with primary key defined.

git-svn-id: http://svn.svnkit.com/repos/sqljet@1269 06c6b4df-3a75-4b2a-9d74-3e57e8079485
Recently added tests backported from 1.1.x

git-svn-id: http://svn.svnkit.com/repos/sqljet@1270 06c6b4df-3a75-4b2a-9d74-3e57e8079485