Hopefully fix some GCC-based buildbots. GCC apparently decays the array to a pointer here before overload resolution, so construct with an explicit length instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135391 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/ArrayRef.h

@@ -190,7 +190,7 @@ namespace llvm {
   /// Construct an ArrayRef from a C array.
   template<typename T, size_t N>
   ArrayRef<T> makeArrayRef(const T (&Arr)[N]) {
-    return Arr;
+    return ArrayRef<T>(Arr, N);
   }
 
   /// @}