pgsql: Use INFO-level for reindex messages, rather than NOTICE.

Log Message:
-----------
Use INFO-level for reindex messages, rather than NOTICE.

Euler Taveira de Oliveira

Modified Files:
--------------
pgsql/src/backend/commands:
indexcmds.c (r1.139 -> r1.140)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/indexcmds.c.diff?r1=1.139&r2=1.140)