Added submodule contents into tree

externals/dynarmic/CMakeModules/CreateDirectoryGroups.cmake

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+# This function should be passed a name of an existing target. It will automatically generate
+# file groups following the directory hierarchy, so that the layout of the files in IDEs matches the
+# one in the filesystem.
+function(create_target_directory_groups target_name)
+    # Place any files that aren't in the source list in a separate group so that they don't get in
+    # the way.
+    source_group("Other Files" REGULAR_EXPRESSION ".")
+
+    get_target_property(target_sources "${target_name}" SOURCES)
+
+    foreach(file_name IN LISTS target_sources)
+        get_filename_component(dir_name "${file_name}" PATH)
+        # Group names use '\' as a separator even though the entire rest of CMake uses '/'...
+        string(REPLACE "/" "\\" group_name "${dir_name}")
+        source_group("${group_name}" FILES "${file_name}")
+    endforeach()
+endfunction()