systemc: Teach verify.py to ignore a new error.

Change-Id: Id967719803b5b306792c9fe6e6ddd36c36e09a88
Reviewed-on: https://gem5-review.googlesource.com/c/12460
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

src/systemc/tests/verify.py

@@ -225,6 +225,7 @@ class LogChecker(Checker):
         warning_filt(540),
         warning_filt(569),
         warning_filt(571),
+        error_filt(525),
         error_filt(541),
         error_filt(542),
         error_filt(543),