table' lockup".
 Changes from the innodb-4.1-ss11 snapshot.
 Do not call os_file-create_tmpfile() at runtime. Instead, create
 a tempfile at startup and guard access to it with a mutex.
 Also, fix bugs:
 10511: "Wrong padding of UCS2 CHAR columns in ON UPDATE CASCADE";
 13778: "If FOREIGN_KEY_CHECKS=0, one can create inconsistent FOREIGN
 KEYs". When FOREIGN_KEY_CHECKS=0 we still need to check that
 datatypes between foreign key references are compatible.
 Also, added test cases (also for bug 9802).