Fix <sys/epoll.h> and <sys/system_properties.h> to include proper C++ inclusion guards
diff --git a/libc/include/sys/epoll.h b/libc/include/sys/epoll.h
index 1478caa..decdb46 100644
--- a/libc/include/sys/epoll.h
+++ b/libc/include/sys/epoll.h
@@ -28,6 +28,10 @@
#ifndef _SYS_EPOLL_H_
#define _SYS_EPOLL_H_
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
#define EPOLLIN 0x00000001
#define EPOLLPRI 0x00000002
#define EPOLLOUT 0x00000004
@@ -62,5 +66,7 @@
int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event);
int epoll_wait(int epfd, struct epoll_event *events, int max, int timeout);
+__END_DECLS
+
#endif /* _SYS_EPOLL_H_ */