fix async v2 flags

Author: Max Charlamb

src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Contracts/RuntimeTypeSystem_1.cs

@@ -134,14 +134,14 @@ private static uint ComputeSize(Target target, Data.MethodDesc desc)
         {
             // Size of the MethodDesc is variable, read it from the targets lookup table
             // See MethodDesc::SizeOf in method.cpp for details
-            // TODO(cdac): make sure this value is stored in minidumps
             TargetPointer methodDescSizeTable = target.ReadGlobalPointer(Constants.Globals.MethodDescSizeTable);
 
             ushort arrayOffset = (ushort)(desc.Flags & (ushort)(
                 MethodDescFlags_1.MethodDescFlags.ClassificationMask |
                 MethodDescFlags_1.MethodDescFlags.HasNonVtableSlot |
                 MethodDescFlags_1.MethodDescFlags.HasMethodImpl |
-                MethodDescFlags_1.MethodDescFlags.HasNativeCodeSlot));
+                MethodDescFlags_1.MethodDescFlags.HasNativeCodeSlot |
+                MethodDescFlags_1.MethodDescFlags.HasAsyncMethodData));
             return target.Read<byte>(methodDescSizeTable + arrayOffset);
         }
 

src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/RuntimeTypeSystemHelpers/MethodDescFlags_1.cs

@@ -15,6 +15,7 @@ internal enum MethodDescFlags : ushort
         HasNonVtableSlot = 0x0008,
         HasMethodImpl = 0x0010,
         HasNativeCodeSlot = 0x0020,
+        HasAsyncMethodData = 0x040,
         #endregion Optional slots
     }