manifest: don't take normpath in ManifestProject.__init__

We should be using PurePath comparison if we need to compare paths.

Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>

src/west/manifest.py

@@ -1418,7 +1418,7 @@ class ManifestProject(Project):
         self.topdir = topdir
         self._abspath = None
         self._posixpath = None
-        self._path = os.path.normpath(path) if path else None
+        self._path = path
 
         # Extension commands.
         self.west_commands = west_commands