[LAA] Rename Strides to SymblicStrides in analyzeLoop. NFC

This is to facilitate to move of SymblicStrides from LV to LAA.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272879 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed