Follow up to r289732: Update comments in source files to reference .cpp files

Patch by Hansang Bae

llvm-svn: 289739
diff --git a/openmp/runtime/src/kmp_dispatch.cpp b/openmp/runtime/src/kmp_dispatch.cpp
index 4df22ed..305839b 100644
--- a/openmp/runtime/src/kmp_dispatch.cpp
+++ b/openmp/runtime/src/kmp_dispatch.cpp
@@ -2616,7 +2616,7 @@
 /*! @} */
 
 //-----------------------------------------------------------------------------------------
-//Non-template routines from kmp_dispatch.c used in other sources
+//Non-template routines from kmp_dispatch.cpp used in other sources
 
 kmp_uint32 __kmp_eq_4( kmp_uint32 value, kmp_uint32 checker) {
     return value == checker;