Fix constructor-related typos.

Noticed by Roman Divacky.

llvm-svn: 190311
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index a4ed404..594f798 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -9937,7 +9937,7 @@
   assert(ClassDecl && "DefineImplicitCopyConstructor - invalid constructor");
 
   // C++11 [class.copy]p7:
-  //   The [definition of an implicitly declared copy constructro] is
+  //   The [definition of an implicitly declared copy constructor] is
   //   deprecated if the class has a user-declared copy assignment operator
   //   or a user-declared destructor.
   if (getLangOpts().CPlusPlus11 && CopyConstructor->isImplicit())