devel/rust-bindgen-cli: convert to WRKSRC_crate

devel/rust-bindgen-cli/Makefile

@@ -19,7 +19,7 @@ PLIST_FILES=	bin/${PORTNAME:S/-cli//}
 
 post-patch:
 	@${REINPLACE_CMD} -e 's,"llvm-config,"${LLVM_CONFIG},' \
-		${WRKSRC}/cargo-crates/clang-sys-*/build/common.rs \
-		${WRKSRC}/cargo-crates/clang-sys-*/src/support.rs
+		${WRKSRC_crate_clang-sys}/build/common.rs \
+		${WRKSRC_crate_clang-sys}/src/support.rs
 
 .include <bsd.port.mk>