Refer to -help instead of --help since this is what tools themselves say.
Also, have tools output -help-hidden rather than refer to --help-hidden,
for consistency, and likewise adjust documentation.  This doesn't change
every mention of --help, only those which seemed clearly safe.

llvm-svn: 96578
23 files changed
tree: 6cf819f97c79590819e12a5101bf8ad9ddb4df0e
  1. clang/
  2. compiler-rt/
  3. llvm/