Rename parameter buffer to customDebugInformation

src/Dependencies/Microsoft.DiaSymReader/ISymUnmanagedReader2.cs

@@ -124,7 +124,7 @@ public interface ISymUnmanagedReader2 : ISymUnmanagedReader
             [MarshalAs(UnmanagedType.LPWStr)] string name,
             int bufferLength,
             out int count,
-            [In, Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 2)] byte[] buffer);
+            [In, Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 2)] byte[] customDebugInformation);
 
         [PreserveSig]
         int GetMethodsInDocument(

src/Dependencies/Microsoft.DiaSymReader/ISymUnmanagedReader3.cs

@@ -124,7 +124,7 @@ public interface ISymUnmanagedReader3 : ISymUnmanagedReader2
             [MarshalAs(UnmanagedType.LPWStr)] string name,
             int bufferLength,
             out int count,
-            [In, Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 2)] byte[] buffer);
+            [In, Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 2)] byte[] customDebugInformation);
 
         [PreserveSig]
         new int GetMethodsInDocument(
@@ -159,7 +159,7 @@ public interface ISymUnmanagedReader3 : ISymUnmanagedReader2
             [MarshalAs(UnmanagedType.LPWStr)] string name,
             int bufferLength,
             out int count,
-            [In, Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 3)] byte[] buffer);
+            [In, Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 3)] byte[] customDebugInformation);
 
         #endregion  
     }