Fixed that test_thr_alarm works


mysql-test/mysql-test-run.pl:
  Fixed typo
mysql-test/r/synchronization.result:
  Updated results
mysql-test/t/disabled.def:
  Disabled syncronization test at it fails on multiple platforms. (Bug #24529)
mysql-test/t/synchronization.test:
  Drop used tables
mysys/Makefile.am:
  Added 'debug' to be able to build test cases
mysys/thr_alarm.c:
  Fixed test case