Revert "[ubsan] lit changes for lld testing, future lto testing."

This reverts commit r319525.

This change has introduced a problem with the Lit tests build for compiler-rt using Gold: http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/6047/steps/test%20standalone%20compiler-rt/logs/stdio

llvm-lit: /b/sanitizer-x86_64-linux/build/llvm/utils/lit/lit/TestingConfig.py:101: fatal: unable to parse config file '/b/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/profile/Linux/lit.local.cfg', traceback: Traceback (most recent call last):
  File "/b/sanitizer-x86_64-linux/build/llvm/utils/lit/lit/TestingConfig.py", line 88, in load_from_path
    exec(compile(data, path, 'exec'), cfg_globals, None)
  File "/b/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/profile/Linux/lit.local.cfg", line 37, in <module>
    if root.host_os not in ['Linux'] or not is_gold_linker_available():
  File "/b/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/test/profile/Linux/lit.local.cfg", line 27, in is_gold_linker_available
    stderr = subprocess.PIPE)
  File "/usr/lib/python2.7/subprocess.py", line 390, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1024, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
llvm-svn: 319529