Properly handle relative mpp-embed paths during rewrite
We need to generate an absolute path, which may not be true if the manifest path is relative, so add os.path.abspath() call.
I also added a normpath() call to clean up the resulting paths.
We need to generate an absolute path, which may not be true if the manifest path is relative, so add os.path.abspath() call.
I also added a normpath() call to clean up the resulting paths.