BPXYSELT — Map the timeout value for the select syscall

AMODE 64 callers use BPXYSELT — Map the timeout value for the select syscall.

                                                      
            BPXYSELT   ,                                                        
** BPXYSELT: Select Time Structure                                              
**  Used By: Select Syscall                                                     
SELT                 DSECT ,                                                    
SELTBEGIN            DS    0D                                                   
*--------------------------31-bit format                                        
*                                                                               
TV_SEC               DS    F'0'   Seconds                                       
TV_USEC              DS    F'0'   Microseconds                                  
*   Constants                                                                   
*                                                                               
SELT#LENGTH          EQU   *-SELT Length of SELT                                
** BPXYSELT End