Fix typo in comment

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133617 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Basic/Specifiers.h b/include/clang/Basic/Specifiers.h
index d21bda7..cfce0cc 100644
--- a/include/clang/Basic/Specifiers.h
+++ b/include/clang/Basic/Specifiers.h
@@ -83,7 +83,7 @@
   /// ExprValueKind - The categorization of expression values,
   /// currently following the C++0x scheme.
   enum ExprValueKind {
-    /// An r-value expression (a gr-value in the C++0x taxonomy)
+    /// An r-value expression (a pr-value in the C++0x taxonomy)
     /// produces a temporary value.
     VK_RValue,