package/zynaddsubfx: fix build with gcc 13

When compiling with gcc 13, build fails with errors, such as:

    In file included from /build/zynaddsubfx-3.0.6/src/Nio/NulEngine.h:21,
                     from /build/zynaddsubfx-3.0.6/src/Nio/NulEngine.cpp:14:
    /build/zynaddsubfx-3.0.6/src/Nio/MidiIn.h:37:9: error: 'uint8_t' does not name a type
       37 |         uint8_t midiSysEx(unsigned char data);
          |         ^~~~~~~

Those gcc 13 changes were announced at:
https://gcc.gnu.org/gcc-13/porting_to.html#header-dep-changes

This commit fixes the issue by adding upstream patches, not yet
included in a release.

Fixes:
http://autobuild.buildroot.net/results/97b5a30c7be820ac91e745cf60f9b759e962aa5c

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 56e7ca5dbc466f301ef6f5810177cfc17f73b9ae)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/zynaddsubfx/0001-MidiIn-Add-stdint.h-header-include.patch

@@ -0,0 +1,26 @@
+From 4f1565f18cf71867f25f31c50c3a5e6995f49ae6 Mon Sep 17 00:00:00 2001
+From: fundamental <mark.d.mccurry@gmail.com>
+Date: Sat, 22 Apr 2023 10:21:09 -0400
+Subject: [PATCH] MidiIn: Add stdint.h header include
+
+Upstream: https://github.com/zynaddsubfx/zynaddsubfx/commit/70905c96fe7b9ffde19bc4bc05b0dc53a1ed1707
+Signed-off-by: Julien Olivain <ju.o@free.fr>
+---
+ src/Nio/MidiIn.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/Nio/MidiIn.h b/src/Nio/MidiIn.h
+index ce0bcfec..c6b30c61 100644
+--- a/src/Nio/MidiIn.h
++++ b/src/Nio/MidiIn.h
+@@ -17,6 +17,7 @@
+ #define MIDI_IN_H
+ 
+ #include "Engine.h"
++#include <stdint.h>//uint8_t
+ 
+ namespace zyn {
+ 
+-- 
+2.41.0
+

package/zynaddsubfx/0002-Bank-Add-stdint.h-header-include.patch

@@ -0,0 +1,28 @@
+From eab3bc1712e5af7e6aef942a24e833ce2c429436 Mon Sep 17 00:00:00 2001
+From: fundamental <mark.d.mccurry@gmail.com>
+Date: Wed, 19 Apr 2023 21:52:01 -0400
+Subject: [PATCH] Bank: Add stdint.h header include
+
+As uint8_t is used, this header should be included.
+
+Upstream: https://github.com/zynaddsubfx/zynaddsubfx/commit/f384d92486d6b515cb628d0f52008a9e03341d8c
+Signed-off-by: Julien Olivain <ju.o@free.fr>
+---
+ src/Misc/Bank.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/Misc/Bank.h b/src/Misc/Bank.h
+index 5120441a..3f324dd8 100644
+--- a/src/Misc/Bank.h
++++ b/src/Misc/Bank.h
+@@ -18,6 +18,7 @@
+ #include <vector>
+ #include "../globals.h"
+ #include "Config.h"
++#include <stdint.h>
+ 
+ //entries in a bank
+ #define BANK_SIZE 160
+-- 
+2.41.0
+