Give -loop-vectorize an explicit default.

This way, clang -mllvm -print-options shows that the driver is overriding it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176569 91177308-0d34-0410-b5e6-96231b3b80d8
Remove tailing whitespaces



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176570 91177308-0d34-0410-b5e6-96231b3b80d8