Fixed an issue when machine:X86 was defined on Windows x64

Author: Andrey Senyaev

setup.py

@@ -151,6 +151,12 @@ def main():
             "-DBUILD_PERF_TESTS=OFF",
             "-DBUILD_DOCS=OFF",
         ]
+        + (
+            # If it is not defined 'linker flags: /machine:X86' on Windows x64
+            ["-DCMAKE_GENERATOR_PLATFORM=x64"]
+            if x64 and sys.platform == "win32"
+            else []
+          )
         + (
             ["-DOPENCV_EXTRA_MODULES_PATH=" + os.path.abspath("opencv_contrib/modules")]
             if build_contrib