reverting /inc and /src back to original states

[mainframed]

I've undone my mistake and everything builds fine now using jcc (with wine):

Before running make

 READY
rexx
 BREXX/370 V2R5M3 (Feb 03 2024)

After running make

 READY
rexx
 BREXX/370 V2R5M3 (Apr 27 2024)
 READY
rexx 'brexx.v2r5m3.samples($date)'
 ------------------------------------------------------------
 Some Date functions
 ------------------------------------------------------------
 Default      27/04/2024
 JDN          2460428
 Julian       2024118
 Base         739002
 USA          04/27/2024
 European     27/04/2024
 German       27.04.2024
 Standard     20240427
 Short        27 APR 2024
 Long         27 APRIL 2024
 Ordered      2024/04/27
 Weekday      Saturday
 Days/Year    118
 Days/Century 8884
 Christmas 2018           24 December 2018
 Weekday  XMAS 2018       Sunday
 days/year Xmas 2018      358
 days since 1.1.1         4179903
 days since 24. Nov -4714 2459997
 days since 1. Jan 1970   19409
 International date       Saturday, April 27, 2024
 Ordered date             2024/04/27
 READY