[libcxx] [test] Narrow down XFAILs regarding a MSVC mode specific bug to "windows-dll && msvc"

These tests don't fail when only windows-dll is set in mingw mode, as the
bug is specific to MSVC mode.

Differential Revision: https://reviews.llvm.org/D112348

Author: mstorsjo

libcxx/test/std/localization/locale.categories/category.collate/locale.collate.byname/hash.pass.cpp

@@ -9,7 +9,7 @@
 // REQUIRES: locale.en_US.UTF-8
 
 // https://llvm.org/PR41018
-// XFAIL: windows-dll
+// XFAIL: windows-dll && msvc
 
 // <locale>
 

libcxx/test/std/localization/locale.categories/category.collate/locale.collate/locale.collate.members/compare.pass.cpp

@@ -7,7 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // https://llvm.org/PR41018
-// XFAIL: windows-dll
+// XFAIL: windows-dll && msvc
 
 // <locale>
 

libcxx/test/std/localization/locale.categories/category.collate/locale.collate/locale.collate.members/hash.pass.cpp

@@ -7,7 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // https://llvm.org/PR41018
-// XFAIL: windows-dll
+// XFAIL: windows-dll && msvc
 
 // <locale>
 

libcxx/test/std/localization/locales/locale/locale.operators/compare.pass.cpp

@@ -7,7 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // https://llvm.org/PR41018
-// XFAIL: windows-dll
+// XFAIL: windows-dll && msvc
 
 // <locale>