Add missing #include

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181900 91177308-0d34-0410-b5e6-96231b3b80d8
[objc-arc] Fixed a spelling error and made the statistic descriptions be consistent about their usage of periods.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181901 91177308-0d34-0410-b5e6-96231b3b80d8