Assembler.groovy enhancement request to add SYSTERM DD and additional SYSIN

[rsjrny]

For Assembler.groovy to work in my environment I have had to make the following modifications. I think these will fit nicely into the zappbuild application

We use SYSTERM linkedit parm and would like it to optionally print along with the other printlin (stdout) output at execution time.

also,
We concatenate SYSIN files ahead of the member being assembled. this can be 1 - x lib(members). An assembler_PreSYSIN list would be useful assembler_PreSYSIN=lib.one.sysin,lib.two.sysin,lib.three.sysin. if this parm is not null these would be concatenated in order ahead of the SYSIN member