added synchronization in mysql_create_like_table

(
fixed BUG #2385 CREATE TABLE LIKE lacks locking on source and destination table
and added tests for it
)

mysql-test/include/have_debug.inc

@@ -0,0 +1,4 @@
+-- require r/have_debug.require
+disable_query_log;
+select instr(version(),convert('debug' using utf8))!=0;
+enable_query_log;