Fix leaked symbols on FreeBSD [ci skip]

tool/leaked-globals

@@ -67,6 +67,7 @@ IO.foreach("|#{NM} #{ARGV.join(' ')}") do |line|
   next unless n.sub!(/^#{SYMBOL_PREFIX}/o, "")
   next if n.include?(".")
   next if !so and n.start_with?("___asan_")
+  case n; when "_init", "_fini"; next end
   case n
   when /\A(?:Init_|InitVM_|pm_|[Oo]nig|dln_|coroutine_)/
     next

vm_dump.c

@@ -836,6 +836,9 @@ rb_print_backtrace(FILE *errout)
 }
 
 #ifdef HAVE_LIBPROCSTAT
+struct procstat;
+struct kinfo_proc;
+static void procstat_vm(struct procstat *, struct kinfo_proc *, FILE *);
 #include "missing/procstat_vm.c"
 #endif