Fixed some timing issues in test suite



mysql-test/mysql-test-run.pl:
  Added suppression of errors that comes when master is killed before slave has connect (like with rpl_udf.test)
mysql-test/suite/funcs_1/datadict/processlist_priv.inc:
  Wait for check thread to end
mysql-test/suite/pbxt/t/status.test:
  Added longer sleep to avoid timing issue
support-files/compiler_warnings.supp:
  Fixed wrong suppression