baremetal: build userland programs using userland_and_baremetal instead of symlinks

Otherwise I'll go crazy with symlink action.

test-baremetal

@@ -11,6 +11,7 @@ import thread_pool
 class Main(common.TestCliFunction):
     def __init__(self):
         super().__init__(
+            is_baremetal=True,
             supported_archs=common.consts['crosstool_ng_supported_archs'],
         )
         self.add_argument(
@@ -23,7 +24,10 @@ If given, run only the given tests. Otherwise, run all tests.
 
     def setup_one(self):
         self.env['tests'] = self.resolve_targets(
-            self.env['baremetal_source_dir'],
+            [
+                self.env['baremetal_source_dir'],
+                self.env['userland_source_dir']
+            ],
             self.env['tests']
         )