Merge Revision revid:jimmy.yang@oracle.com-20100526014433-bx0t9794mnvkiaft from MySQL InnoDB

For Drizzle, this means we re-implement all the I_S views as table functions. 

Original revid:jimmy.yang@oracle.com-20100526014433-bx0t9794mnvkiaft

Original Authors: Jimmy Yang <jimmy.yang@oracle.com>
Original commit message:
Check in the support for Information Schema System Table Views. Users
can now view the content of InnoDB System Tables through following
information schema tables:

information_schema.INNODB_SYS_TABLES
information_schema.INNODB_SYS_INDEXES
information_schema.INNODB_SYS_COUMNS
information_schema.INNODB_SYS_FIELDS
information_schema.INNODB_SYS_FOREIGN
information_schema.INNODB_SYS_FOREIGN_COLS
information_schema.INNODB_SYS_TABLESTATS

rb://330 Approved by Marko