Build support for s390x: clr.iltools and clr.paltests

[uweigand]

• Add dummy support for s390x in vm, jit, debug, and unwinder

• This suffices to make clr.iltools and clr.paltests buildable

Note to reviewers:

• When building clr.iltools and/or clr.paltests, the vm/jit/debug/unwinder directories are never actually compiled. However, the cmake process is still executed, so there needs to be enough support for the s390x platform there to avoid cmake aborting (due to missing files or explicit aborts). Let me know if you have any other suggestions on how to enable building just those clr subtargets.

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Issue Details

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• Add dummy support for s390x in vm, jit, debug, and unwinder

• This suffices to make clr.iltools and clr.paltests buildable

Note to reviewers:

• When building clr.iltools and/or clr.paltests, the vm/jit/debug/unwinder directories are never actually compiled. However, the cmake process is still executed, so there needs to be enough support for the s390x platform there to avoid cmake aborting (due to missing files or explicit aborts). Let me know if you have any other suggestions on how to enable building just those clr subtargets.

Author:	uweigand
Assignees:	-
Labels:	area-Infrastructure-coreclr
Milestone:	-

[AaronRobinsonMSFT]

/cc @janvorli

[janvorli]

LGTM, thank you