WL#3517: Partitioning: Use binary .frm format for entire definition

From Brian Aker's analysis of partition code:

The current partition code stores the syntax of the 
CREATE TABLE ... PARTITION clause in clear text,
beginning at position 00001010 of the corresponding
.frm file. This requires MySQL to parse and execute
the information each time the .frm file is accessed,
leading to a performance cost. 

MySQL should optimize this and store partitioning
information in binary format.