Debug information is sometimes missing when compiling with cl-clang

Via UDN:

As has been discussed previously here and in CL 20055361, debug information is sometimes missing when compiling with Clang.

We've pinpointed this to debug information not being emitted for types that aren't defined and used by the current module. To circumvent this issue, clang has an [Link Removed] flag. Adding that flag in VCToolChain.cs fixes the issue for us.

This question was created in reference to: Natvis inconsistency between VS and Clang

Dev Notes:

• Gather metrics on if -fstandalone-debug affects compile time and pdb size

• Compile a Microsoft platform with clang
• In some cases if a module does not define a type it will cause debug info to not be emitted