[MLIR] [Python] Fix out-of-tree Windows python bindings

[jdd]

Summary

MSVC needs to know where to put the archive (.lib) as well as the runtime
(.dll). If left to the default location, multiple rules to generate the same
file will be produced, creating a Ninja error.

[jdd]

Landing this without review as it is "obvious".

[stellaraccident]

Lgtm - thanks for the fix, as discussed.

mlir/cmake/modules/AddMLIRPython.cmake

function(add_mlir_python_extension libname extname)
   )
 
   if(WIN32)
     # Need to also set the RUNTIME_OUTPUT_DIRECTORY on Windows in order to
     # control where the .dll gets written.
     set_target_properties(
       ${libname} PROPERTIES
       RUNTIME_OUTPUT_DIRECTORY ${ARG_OUTPUT_DIRECTORY}
+      ARCHIVE_OUTPUT_DIRECTORY ${ARG_OUTPUT_DIRECTORY}
     )
   endif()
 
   # pybind11 requires binding code to be compiled with -fvisibility=hidden
   # For static linkage, better code can be generated if the entire project
   # compiles that way, but that is not enforced here. Instead, include a linker
   # script that explicitly hides anything but the PyInit_* symbols, allowing gc
   # to take place.