be profiled separately.

Expand the time formats in i_s.profiling to wide enough for larger
numbers.


mysql-test/r/profiling.result:
  Show that each query inside a procedure is profiled separately.
mysql-test/t/profiling.test:
  Show that each query inside a procedure is profiled separately.
sql/sp_head.cc:
  Poke profiling into stored-procedure code.  For statement parts only
  of routines, process them as profilable discrete queries.
sql/sql_profile.cc:
  Encode decimal size correctly.