fpga: tools: Fix error detection in run_testbenches.py

This fixes recognition of $error and $fatal statements in the output of
XSim when running run_testbenches.py. XSim apparently prints a "shift
in" character (0x15) as part of its error statements, so the regular
expression was not matching.


Original-commit: ee36d7fabcf73f773edae00fbb1604a600db992d

tools/utils/run_testbenches.py

@@ -157,7 +157,7 @@ def parse_output(simout):
     # testbench or may occur in a subsequent instance, after a pass.
     tb_match_error = ([
         '\n',
-        '(Error|Fatal): .*\n',
+        '(Error|Fatal): .*\n.?',
         'Time: .+\n',
     ])
     m_error = re.search(''.join(tb_match_error), plain_simout)