[clang][NFC] Adjust expected directives in DR tests further

This is a follow-up to 96070e1, where long long case was hidden by a different error.

Addresses bot failures:
https://lab.llvm.org/buildbot/#/builders/123/builds/23355

clang/test/CXX/drs/dr2xx.cpp

@@ -1298,7 +1298,7 @@ namespace dr299 { // dr299: 2.8 c++11
   // cxx98-11-error@#dr299-q {{ambiguous conversion of array size expression of type 'T' to an integral or enumeration type}}
   //  cxx98-11-note@#dr299-int {{conversion to integral type 'int' declared here}}
   //  cxx98-11-note@#dr299-ushort {{conversion to integral type 'unsigned short' declared here}}
-  // since-cxx14-error-re@#dr299-q {{{{conversion from 'T' to 'unsigned (long|int)' is ambiguous}}}}
+  // since-cxx14-error-re@#dr299-q {{{{conversion from 'T' to 'unsigned (long long|long|int)' is ambiguous}}}}
   //  since-cxx14-note@#dr299-int {{candidate function}}
   //  since-cxx14-note@#dr299-ushort {{candidate function}}
 }