systemc: Exclude another test which exercises sc_string.

Change-Id: Ic05fe3d34ef403dd6ad9348478f73c6ed50cc7bc
Reviewed-on: https://gem5-review.googlesource.com/11264
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

src/systemc/tests/working.filt

@@ -23,6 +23,7 @@ path in (
 
     # Tests the deprecated sc_string type which we aren't supporting.
     "systemc/bugs/sc_string_bracket_assign",
+    "systemc/misc/stars/star124010",
 
     # This test declares a constructor it never defines, so it's not clear how
     # it would ever work?