meta: move photon/libc to root

libc/internal/stack_chk_fail.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+_Noreturn void __stack_chk_fail(void)
+{
+    fprintf(stderr, "Stack smashing detected!\n");
+    abort();
+}