gen: Generate struct layout size tests
gen: Generate struct layout size tests

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