[opt-viewer] Fix option name
[opt-viewer] Fix option name

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@319072 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit aa1bb20e604af9e3e0857b51eb51287df63f4309)

apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm