dd29ab llvm-test fixes

Authored and Committed by tstellar 2 years ago
    llvm-test fixes
    Try to simply lit config file generation by adding standalone fedora specific
    config file.  In the future, when we need to customize the lit config
    for the llvm-test package, we can just update lit.fedora.cfg.py rather
    than trying to patch the default config from the spec file.
    This patch also makes the run-lit-tests script identical on all arches,
    so it will no longer cause multi-lib conflicts.
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