Add needed functions to glibc-compat for pkg

ports/glibc-compat/include/time.h

Index: ports/glibc-compat/include/time.h
diff --git a/ports/glibc-compat/include/sys/stat.h b/ports/glibc-compat/include/time.h
similarity index 50%
copy from ports/glibc-compat/include/sys/stat.h
copy to ports/glibc-compat/include/time.h
index 9fefc086316dbc37f91069b40996f6d2788788b6..01243ad3cccbaf5f1a2ce6ad976af3d829d07d64 100644
--- a/ports/glibc-compat/include/sys/stat.h
+++ b/ports/glibc-compat/include/time.h
@@ -3,20 +3,16 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
+#ifndef GLIBCEMU_TIME_H
+#define GLIBCEMU_TIME_H 1
 
-#ifndef GLIBCEMU_SYS_STAT_H
-#define GLIBCEMU_SYS_STAT_H 1
+#include_next <time.h>
 
-#include_next <sys/stat.h>
+#include <sys/cdefs.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-mode_t umask(mode_t mask);
-
-#ifdef __cplusplus
-}
-#endif
+__BEGIN_DECLS
+time_t timegm(struct tm *tm);
+time_t timelocal(struct tm *tm);
+__END_DECLS
 
 #endif