Remove ZeroOrMore from the option description. We don't need it here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178623 91177308-0d34-0410-b5e6-96231b3b80d8
Fix grammar.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178624 91177308-0d34-0410-b5e6-96231b3b80d8