corrected wrong checking of DBUG_OFF in mysql-test/t/synchronization.test

mysql-test/r/have_debug.require:
  corrected mistake
mysql-test/t/synchronization.test:
  corrected wrong test

mysql-test/r/have_debug.require

-instr(version(),convert('debug' using utf8))!=0;
+instr(version(),convert('debug' using utf8))!=0
 1

mysql-test/t/synchronization.test

--- source include/have_crypt.inc
+-- source include/have_debug.inc
 
 #
 # Test for Bug #2385 CREATE TABLE LIKE lacks locking on source and destination table