[X86][SSE] Tidyup LowerBuildVectorv16i8 and LowerBuildVectorv8i16. NFCI.

Run clang-format and standardized variable names between functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294456 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed