Follow-up for patch fixing bug #57006 "Deadlock between

HANDLER and FLUSH TABLES WITH READ LOCK" and bug #54673
"It takes too long to get readlock for 'FLUSH TABLES
WITH READ LOCK'".

Disable execution of flush_read_lock.test on embedded
server. This test uses too many statements which are
not supported by embedded server.

mysql-test/t/flush_read_lock.test

@@ -7,6 +7,9 @@
 --source include/have_innodb.inc
 # We need the Debug Sync Facility.
 --source include/have_debug_sync.inc
+# Parts of this test use DDL on events, BINLOG statement and
+# other statements which are not supported in embedded server.
+-- source include/not_embedded.inc
 # Save the initial number of concurrent sessions.
 --source include/count_sessions.inc