parser: Ignore functions after vtable calculations
parser: Ignore functions after vtable calculations

This makes us pass three more tests.

emilio/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,jdub/rust-bindgen,catdesk/rust-bindgen,rust-lang/rust-bindgen,jdub/rust-bindgen,emilio/rust-bindgen,jdub/rust-bindgen,catdesk/rust-bindgen,emilio/rust-bindgen,jdub/rust-bindgen,emilio/rust-bindgen,catdesk/rust-bindgen,catdesk/rust-bindgen,rust-lang/rust-bindgen