link filed bug for clang-directx, remove directx-warp xfail as a test

Author: kmpeng

test/Feature/HLSLLib/mad.32.test

@@ -207,7 +207,7 @@ DescriptorSets:
         Binding: 11
 #--- end
 
-# TODO: File bug and link here
+# TODO: https://github.com/llvm/llvm-project/issues/152220
 # XFAIL: Clang-DirectX
 
 # RUN: split-file %s %t

test/Feature/HLSLLib/mad.fp64.test

@@ -82,9 +82,6 @@ DescriptorSets:
         Binding: 3
 #--- end
 
-# TODO: File bug and link here
-# XFAIL: DirectX-WARP
-
 # REQUIRES: Double
 # RUN: split-file %s %t
 # RUN: %dxc_target  -T cs_6_5 -Fo %t.o %t/source.hlsl

test/Feature/HLSLLib/mad.int16.test

@@ -141,7 +141,7 @@ DescriptorSets:
         Binding: 7
 #--- end
 
-# TODO: File bug and link here
+# TODO: https://github.com/llvm/llvm-project/issues/152220
 # XFAIL: Clang-DirectX
 
 # REQUIRES: Int16

test/Feature/HLSLLib/mad.int64.test

@@ -141,7 +141,7 @@ DescriptorSets:
         Binding: 7
 #--- end
 
-# TODO: File bug and link here
+# TODO: https://github.com/llvm/llvm-project/issues/152220
 # XFAIL: Clang-DirectX
 
 # REQUIRES: Int64