Add missing includes

Explicitly include <sys/stat.h> for fchmod() and umask(). Right now it
is included by <path_utils.h>, so make sure the headers are pulled in no
matter what.

Author: ptoscano

src/io_utils.c

@@ -35,6 +35,7 @@
 #include <path_utils.h>
 #include <string.h>
 #include <talloc.h>
+#include <sys/stat.h>
 
 #include "include/io_utils.h"
 #include "include/key.h"

src/sscg.c

@@ -41,6 +41,7 @@
 #include <openssl/evp.h>
 #include <openssl/ssl.h>
 #include <sys/param.h>
+#include <sys/stat.h>
 
 #include "config.h"
 #include "include/sscg.h"