SYSTEM VARIABLE NAME SQL_MAX_JOIN_SI 

BACKGROUND:

ER_TOO_BIG_SELECT refers to SQL_MAX_JOIN_SIZE, which is the
old name for MAX_JOIN_SIZE.

FIX:

Support for old name SQL_MAX_JOIN_SIZE is removed in MySQL 5.6
and is renamed as MAX_JOIN_SIZE.So the errmsg.txt 
and mysql.cc files have been updated and the corresponding result
files have also been updated.