Tests: Fix FindPatch test with VS generators

Tell CTest the project used to name the `.sln` file.

Tests/FindPatch/CMakeLists.txt

@@ -4,5 +4,6 @@ add_test(NAME FindPatch.Test COMMAND
   "${CMake_SOURCE_DIR}/Tests/FindPatch/Test"
   "${CMake_BINARY_DIR}/Tests/FindPatch/Test"
   ${build_generator_args}
+  --build-project TestFindPatch
   --build-options ${build_options}
 )