rtems-4.11: Fix building the SPARC simulator.

Add support for simulator options to enable special features of
some gdb simulators.

source-builder/sb/config.py

@@ -531,7 +531,7 @@ class file:
                         log.warning('malformed expand macro, no colon found')
                     else:
                         e = self._expand(m[colon + 1:-1].strip())
-                        s = s.replace(m, e)
+                        s = s.replace(m, self._label(e))
                         expanded = True
                         mn = None
                 elif m.startswith('%{with '):