Adding auxiliary scripts that allow to display messages in result files from within test files

- show_msg.inc   - displays a message followed by a line of '-' at the length of the messgae
 - show_msg80.inc - displays a message followed by a line of '-' with a fixed length of 80

mysql-test/include/show_msg.inc

@@ -0,0 +1,19 @@
+#### include/show_msg.inc
+#
+# This file writes the value set in @message into the
+# a protocol file as part of executing a test sequence
+#
+# Usage:
+#    Add the following to any *.test file:
+#      :
+#    set @message="This is a message example";
+#    --source include/show_msg.inc
+#      :
+#
+
+--disable_query_log
+SET @utf8_message = CONVERT(@message using utf8);
+select @utf8_message as ""
+union
+select repeat(CONVERT('-' using utf8),char_length(@utf8_message));
+--enable_query_log