fixes XL C++ compiler errors (by Pasi Valminen)

include/gtest/internal/gtest-internal.h

@@ -788,13 +788,14 @@ struct RemoveConst { typedef T type; };  // NOLINT
 template <typename T>
 struct RemoveConst<const T> { typedef T type; };  // NOLINT
 
-// MSVC 8.0 and Sun C++ have a bug which causes the above definition
-// to fail to remove the const in 'const int[3]'.  The following
-// specialization works around the bug.  However, it causes trouble
-// with GCC and thus needs to be conditionally compiled.
-#if defined(_MSC_VER) || defined(__SUNPRO_CC)
+// MSVC 8.0, Sun C++, and IBM XL C++ have a bug which causes the above
+// definition to fail to remove the const in 'const int[3]' and 'const
+// char[3][4]'.  The following specialization works around the bug.
+// However, it causes trouble with GCC and thus needs to be
+// conditionally compiled.
+#if defined(_MSC_VER) || defined(__SUNPRO_CC) || defined(__IBMCPP__)
 template <typename T, size_t N>
-struct RemoveConst<T[N]> {
+struct RemoveConst<const T[N]> {
   typedef typename RemoveConst<T>::type type[N];
 };
 #endif