package/woff2: fix build with newer gcc

Fixes a build error not yet seen by the autobuilders due to other
packages failing before. Seen with defconfig:
https://autobuild.buildroot.net/results/ebf/ebf9a81f7e225ecdab20bbad8ad8daa136fddb46/

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/woff2/0002-include-woff2-output.h-add-missing-stdint.h-include.patch

@@ -0,0 +1,41 @@
+From 08ece7871775c0d7bf4fdff64b961cdc256adf6c Mon Sep 17 00:00:00 2001
+From: Sergei Trofimovich <slyich@gmail.com>
+Date: Fri, 2 Aug 2024 22:12:03 +0100
+Subject: [PATCH] include/woff2/output.h: add missing <stdint.h> include
+
+Without the change `woff2` build fails on upcoming `gcc-15` as:
+
+    In file included from src/woff2_out.cc:9:
+    include/woff2/output.h:73:25: error: expected ')' before '*' token
+       73 |   WOFF2MemoryOut(uint8_t* buf, size_t buf_size);
+          |                 ~       ^
+          |                         )
+    include/woff2/output.h:79:3: error: 'uint8_t' does not name a type
+       79 |   uint8_t* buf_;
+          |   ^~~~~~~
+    include/woff2/output.h:16:1: note: 'uint8_t' is defined in header '<cstdint>';
+      this is probably fixable by adding '#include <cstdint>'
+       15 | #include <string>
+      +++ |+#include <cstdint>
+       16 |
+
+Upstream: https://github.com/google/woff2/pull/176
+
+Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
+---
+ include/woff2/output.h | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/include/woff2/output.h b/include/woff2/output.h
+index dc78ccf..b12d538 100644
+--- a/include/woff2/output.h
++++ b/include/woff2/output.h
+@@ -9,6 +9,8 @@
+ #ifndef WOFF2_WOFF2_OUT_H_
+ #define WOFF2_WOFF2_OUT_H_
+ 
++#include <stdint.h>
++
+ #include <algorithm>
+ #include <cstring>
+ #include <memory>