Step 14: First version of table log for add/Drop partition
sql/ha_partition.cc:
Moved create partition name code to sql_partition.cc
sql/handler.h:
Added entries in partition_info to keep track of table log entries
sql/mysql_priv.h:
Moved create partition name code to sql_partition.cc
sql/sql_partition.cc:
Moved create partition name code to sql_partition.cc
First version of table log for add/drop partition
sql/sql_table.cc:
Add IO_SIZE to table log header
