Fixed failing tests in sys_vars as we have now stricter checking of setting of variables.

mysql-test/suite/sys_vars/r/innodb_adaptive_flushing_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/r/innodb_adaptive_hash_index_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/r/innodb_large_prefix_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/r/innodb_random_read_ahead_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/r/innodb_stats_on_metadata_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/r/innodb_strict_mode_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/r/innodb_support_xa_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/r/innodb_table_locks_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/r/rpl_semi_sync_master_enabled_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/r/rpl_semi_sync_slave_enabled_basic.result:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/t/innodb_adaptive_flushing_basic.test:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/t/innodb_adaptive_hash_index_basic.test:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/t/innodb_large_prefix_basic.test:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/t/innodb_random_read_ahead_basic.test:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/t/innodb_stats_on_metadata_basic.test:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/t/innodb_strict_mode_basic.test:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/t/innodb_support_xa_basic.test:
  One can now only assign 0 or 1 to boolean variables
mysql-test/suite/sys_vars/t/innodb_table_locks_basic.test:
  One can now only assign 0 or 1 to boolean variables
mysys/my_getsystime.c:
  Merge + fixed bug that __NR_clock_gettime didn't work in 5.5