Fix a typo in a comment Frits van Bommel spotted.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116614 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CodeGenTBAA.cpp

@@ -56,7 +56,7 @@ CodeGenTBAA::getTBAAInfo(QualType QTy) {
     // Character types are special and can alias anything.
     // In C++, this technically only includes "char" and "unsigned char",
     // and not "signed char". In C, it includes all three. For now,
-    // the risk of exploting this detail in C++ seems likely to outweigh
+    // the risk of exploiting this detail in C++ seems likely to outweigh
     // the benefit.
     case BuiltinType::Char_U:
     case BuiltinType::Char_S: