Tiny fix to the parsing of linkage-specifications

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59820 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/Parser.cpp b/lib/Parse/Parser.cpp
index 861609c..86c2976 100644
--- a/lib/Parse/Parser.cpp
+++ b/lib/Parse/Parser.cpp
@@ -295,7 +295,7 @@
 }
 
 /// ParseExternalDeclaration:
-///       external-declaration: [C99 6.9]
+///       external-declaration: [C99 6.9], declaration: [C++ dcl.dcl]
 ///         function-definition
 ///         declaration
 /// [EXT]   ';'
@@ -307,7 +307,7 @@
 /// [OBJC]  objc-protocol-definition
 /// [OBJC]  objc-method-definition
 /// [OBJC]  @end
-///
+/// [C++]   linkage-specification
 /// [GNU] asm-definition:
 ///         simple-asm-expr ';'
 ///