MPE_Finish_log - Send log to master, who writes it out
int MPE_Finish_log( const char *filename )
MPE_Finish_log() & MPE_Init_log() are NOT needed when liblmpe.a is linked
because MPI_Finalize() would have called MPE_Finish_log() already. liblmpe.a
will be included in the final executable if it is linked with either
"mpicc -mpe=mpilog" or "mpecc -mpilog"
This routine outputs the logfile in CLOG2 format, i.e. a
collective call over 'MPI_COMM_WORLD'.
This function is threadsafe, but MPE_Finish_log() is expected to
be called only on the main thread which initializes MPE logging through
MPE_Init_log().
Always return MPE_LOG_OK.