tools/syz-linter: introduce helper Pass type
tools/syz-linter: introduce helper Pass type

Introduce a helper Pass type so that we can have
some helper methods on it.

Update #1876

google/syzkaller,xairy/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller