[Driver][SYCL] Add additional debug settings when using -g on Windows

[mdtoguchi]

A recent addition of adding sycld.lib on Windows when using the Linux based driver was performed. There is additional tie-ins needed for general usage of debug libraries, which includes adding -D_DEBUG. Add the needed macro and also pull in the debug runtime library to match. This is done only for -fsycl based compilations as that is when we are pulling in these particular libraries.

[mdtoguchi]

@intel/llvm-gatekeepers, this should be ready to go.

[ph0b]

If I understand correctly, this changes makes pulling all the debug libraries when using -g.
-g is used to generate debug information and that shouldn't lead to the use of debug version of libraries in my view.
Use of debug libraries goes way beyond the scope of debug info, have you considered using other ways?

[mdtoguchi]

If I understand correctly, this changes makes pulling all the debug libraries when using -g. -g is used to generate debug information and that shouldn't lead to the use of debug version of libraries in my view. Use of debug libraries goes way beyond the scope of debug info, have you considered using other ways?

@ph0b, yes. There is a newly introduced -fms-runtime-lib=<arg> that we can use instead. This has direct correlation to the /MD* and /MT* options from the MSVC side. We can use that to leverage which debug libraries will be pulled in using the Linux based driver on Windows.