Fixed MDEV-5780 "create-big fails in 10.0"

The issue was that create...trigger part of the test suite used a debug_sync point that before was never triggered (in other words, wrong meaningless test).
With the new create ... replace code the debug sync point is triggered and the test case could not handled that.

I fixed this by adding a wait and go for the debug syncpoint in the test.

Removed some compiler warnings from mysql_cond_timedwait


include/mysql/psi/mysql_thread.h:
  Removed compiler warnings
mysql-test/r/create-big.result:
  New test result
mysql-test/t/create-big.test:
  Fixed test case as create_table_select_before_check_if_exists was not before triggered by the code.

1 files changed, 3 insertions, 1 deletions

diff --git a/mysql-test/r/create-big.result b/mysql-test/r/create-big.result
index c47aecd7174..5aa44c2941d 100644
--- a/mysql-test/r/create-big.result
+++ b/mysql-test/r/create-big.result
@@ -161,7 +161,9 @@ create table t1 (i int);
 set @a:=0;
 set debug_sync='create_table_select_before_check_if_exists SIGNAL parked WAIT_FOR go';
 create table if not exists t1 select 1 as i;;
-create trigger t1_bi before insert on t1 for each row set @a:=1;
+set debug_sync='now WAIT_FOR parked';
+create trigger t1_bi before insert on t1 for each row set @a:=1;;
+set debug_sync='now SIGNAL go';
 Warnings:
 Note	1050	Table 't1' already exists
 select @a;