package/pistache: fix build with gcc >= 13

Fix the following build failure with gcc >= 13:

In file included from ../include/pistache/reactor.h:19,
                 from ../src/common/reactor.cc:13:
../include/pistache/flags.h:29:35: error: 'uint8_t' was not declared in this scope
   29 |         struct TypeStorage<sizeof(uint8_t)>
      |                                   ^~~~~~~
../include/pistache/flags.h:17:1: note: 'uint8_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
   16 | #include <iostream>
  +++ |+#include <cstdint>
   17 | #include <type_traits>

Fixes:
 - http://autobuild.buildroot.org/results/d3b6eb6fb943d69571a311235944df879fccc831

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 6bb275a59a2a0d8454a1121b2660d382c2476b2d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/pistache/0003-Add-missing-cstdint-header-include-1142.patch

@@ -0,0 +1,23 @@
+From dabe9fcd3eaaa6b0b8723369b2565778341630c0 Mon Sep 17 00:00:00 2001
+From: a-andre <13609565+a-andre@users.noreply.github.com>
+Date: Thu, 29 Jun 2023 16:34:11 +0200
+Subject: [PATCH] Add missing cstdint header include (#1142)
+
+Upstream: https://github.com/pistacheio/pistache/commit/dabe9fcd3eaaa6b0b8723369b2565778341630c0
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ include/pistache/flags.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/include/pistache/flags.h b/include/pistache/flags.h
+index 9be2b32bb..6adcc74bc 100644
+--- a/include/pistache/flags.h
++++ b/include/pistache/flags.h
+@@ -13,6 +13,7 @@
+ #pragma once
+ 
+ #include <climits>
++#include <cstdint>
+ #include <iostream>
+ #include <type_traits>
+