libbsd doesn't contain __dead, so bring it back, somewhat

grayed · grayed · commit d3c3ccab9221 · 2021-05-06T03:37:38.000+03:00
diff --git a/compat.h b/compat.h
@@ -79,4 +79,10 @@
 	} while (0)
 #endif
 
+/* Minor goo from sys/cdefs.h absent in libbsd */
+
+#ifndef __dead
+#define __dead	__attribute__((__noreturn__))
+#endif
+
 #endif
