Provide the correct include file for finding the uint32_t definition.

This patch will be sent upstream.

--- lib/idna.h.orig	2016-10-10 08:33:08.794007533 +0000
+++ lib/idna.h	2016-10-10 08:35:30.003511529 +0000
@@ -43,7 +43,7 @@
 # endif
 
 # include <stddef.h>		/* size_t */
-# include <idn-int.h>		/* uint32_t */
+# include <idn/idn-int.h>	/* uint32_t */
 
 # ifdef __cplusplus
 extern "C"
--- lib/pr29.h.orig	2016-10-10 08:33:17.881709287 +0000
+++ lib/pr29.h	2016-10-10 08:35:43.197719107 +0000
@@ -51,7 +51,7 @@
 # include <stdlib.h>
 
   /* Get uint32_t. */
-# include <idn-int.h>
+# include <idn/idn-int.h>
 
   /* Error codes. */
   typedef enum
--- lib/punycode.h.orig	2016-10-10 08:33:24.538122517 +0000
+++ lib/punycode.h	2016-10-10 08:35:57.135867425 +0000
@@ -87,7 +87,7 @@
 /* Public interface (would normally go in its own .h file): */
 
 #include <stddef.h>		/* size_t */
-#include <idn-int.h>		/* uint32_t */
+#include <idn/idn-int.h>	/* uint32_t */
 
   enum punycode_status
   {
--- lib/stringprep.h.orig	2016-10-10 08:35:02.991412123 +0000
+++ lib/stringprep.h	2016-10-10 08:28:52.349467569 +0000
@@ -44,7 +44,7 @@
 
 # include <stddef.h>		/* size_t */
 # include <sys/types.h>		/* ssize_t */
-# include <idn-int.h>		/* uint32_t */
+# include <idn/idn-int.h>	/* uint32_t */
 
 # ifdef __cplusplus
 extern "C"
--- lib/tld.h.orig	2016-10-10 08:33:38.403769891 +0000
+++ lib/tld.h	2016-10-10 08:36:29.358177481 +0000
@@ -54,7 +54,7 @@
 # include <stdlib.h>
 
   /* Get uint32_t. */
-# include <idn-int.h>
+# include <idn/idn-int.h>
 
   /* Interval of valid code points in the TLD. */
   struct Tld_table_element