Add needed functions to glibc-compat for pkg

ports/glibc-compat/include/sys/stat.h

Index: ports/glibc-compat/include/sys/stat.h
diff --git a/ports/glibc-compat/include/sys/stat.h b/ports/glibc-compat/include/sys/stat.h
index 9fefc086316dbc37f91069b40996f6d2788788b6..1262d112b48ce004714ced98e33b0d3f70f6bed5 100644
--- a/ports/glibc-compat/include/sys/stat.h
+++ b/ports/glibc-compat/include/sys/stat.h
@@ -8,12 +8,16 @@
 #define GLIBCEMU_SYS_STAT_H 1
 
 #include_next <sys/stat.h>
-
+                                                        /* 7777 */
+#define ALLPERMS        (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO)
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 mode_t umask(mode_t mask);
+int fchmodat(int dirfd, const char *pathname, mode_t mode, int flags);
+int mkdirat(int dirfd, const char *pathname, mode_t mode);
+int mknodat(int dirfd, const char *pathname, mode_t mode, dev_t dev);
 
 #ifdef __cplusplus
 }