Disable a part of the unit test CommandLineTest/BadResponseFile for z/OS.

[Support] Do not run test on z/OS

A part of the unit test CommandLineTest/BadResponseFile, added in
the commit fd3d7a9f need to be disable for z/OS as it was already done for AIX platform.

Reviewed By: fanbo-meng

Differential Revision: https://reviews.llvm.org/D141084