./build-userland: resolve relative paths

build-userland

@@ -167,6 +167,7 @@ Default: build all examples that have their package dependencies met, e.g.:
         else:
             targets = [self.env['userland_source_dir']]
         for target in targets:
+            target = self.resolve_userland_source(target)
             for path, in_dirnames, in_filenames in self.sh.walk(target):
                 in_dirnames.sort()
                 path_abs = os.path.abspath(path)