[LAA] Improve comment for isStridedPtr
[LAA] Improve comment for isStridedPtr

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@262997 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit db96e9895d06feb5d9b18940790d5d42c737a450)

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