Don't use os.path.relpath in dist command

This is problematic when we meson is installed in the different 
root(say C:) while building from another root(say D:).
This is how it is done in mesonpep517 and causes problems
because of that.

mesonbuild/mdist.py

@@ -313,5 +313,5 @@ def run(options):
     if rc == 0:
         for name in names:
             create_hash(name)
-            print('Created', os.path.relpath(name))
+            print('Created', name)
     return rc