add missing includes for bool and va_copy
https://gitlab.com/fbb-git/yodl/-/merge_requests/5 (commented)
https://gitlab.com/fbb-git/yodl/-/merge_requests/6
https://bugs.gentoo.org/929232
https://bugs.gentoo.org/944159
--- a/root/root.h
+++ b/root/root.h
@@ -11,6 +11,8 @@
 #define _GNU_SOURCE
 #endif
 
+#include <stdarg.h>
+#include <stdbool.h>
 #include <stddef.h>
 
 #define MAX_LINE_LENGTH (1000)