Raise Twitter MySQL version to 5.5.31.t11.1
Partition with UTC_EXTRACT should include endpoint

For table list partition using UTC_EXTRACT(YMD), partition pruning
for predicate on partition key column should include the endpoint
partition. For example, (b > '2013-01-01 13:30:00') should have
partition (20130101) in used partition map.
Expose InnoDB row searches global stats

It exposes btr_cur_n_sea for adaptive hash index searches as
INNODB_ROWS_SEARCH_HASH_INDEX and btr_cur_n_non_sea for B+-tree
index row searches as INNDOB_ROWS_SEARCH_HASH_INDEX.
Merge branch 'MYSQL-164' into t11.1-dev
Twitter MySQL 5.5.31.t11.1