scripts: Fixed case-level flags in bench.py

A typo meant we were setting all case-level flags to suite-level flags
in bench.py. And because suite-level flags are more-or-less just ored
case-level flags, all case-level flags would end up shared.

Fixed via untypo.

Author: geky

scripts/bench.py

@@ -512,7 +512,7 @@ def write_case_functions(f, suite, case):
                         f.writeln(12*' '+'.path = "%s",' % case.path)
                         f.writeln(12*' '+'.flags = %s,' % (
                                 ' | '.join(filter(None, [
-                                        'BENCH_INTERNAL' if suite.internal
+                                        'BENCH_INTERNAL' if case.internal
                                             else None]))
                                     or 0))
                         for ifdef in it.chain(suite.ifdef, case.ifdef):