libgcrypt: Add missing config.h include

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>

src/gcrypt_missing.c

@@ -21,6 +21,8 @@
  * MA 02111-1307, USA.
  */
 
+#include "config.h"
+
 #include <stdlib.h>
 
 #include "libssh/priv.h"

src/libgcrypt.c

@@ -20,6 +20,8 @@
  * MA 02111-1307, USA.
  */
 
+#include "config.h"
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>