package/libsigrokdecode: fix build with python > 3.10

Fix the following build failure with sigrok-cli and python > 3.10:

/home/autobuild/autobuild/instance-3/output-1/host/lib/gcc/mips64-buildroot-linux-gnu/11.3.0/../../../../mips64-buildroot-linux-gnu/bin/ld: /home/autobuild/autobuild/instance-3/output-1/host/bin/../mips64-buildroot-linux-gnu/sysroot/usr/lib/libsigrokdecode.so: undefined reference to `PyTuple_SetItem'

Fixes:
 - http://autobuild.buildroot.org/results/435ad19597a1e216a7974bc9ccaf17064d1eccea

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libsigrokdecode/0003-configure-ac-Use-python3-embed-pc-as-a-fallback.patch

@@ -0,0 +1,30 @@
+From a6a5e2c8b0e9ecf5d69d0c237c8e8b717b82b36f Mon Sep 17 00:00:00 2001
+From: Evangelos Foutras <evangelos@foutrelis.com>
+Date: Thu, 3 Dec 2020 19:17:00 +0200
+Subject: [PATCH] configure.ac: Use python3-embed.pc as a fallback
+
+This provides some future-proofing against newer Python versions.
+
+[Retrieved from:
+https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=commit;h=a6a5e2c8b0e9ecf5d69d0c237c8e8b717b82b36f]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ configure.ac | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index b8841f8..c1314bb 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -100,7 +100,7 @@ SR_PKG_CHECK_SUMMARY([srd_pkglibs_summary])
+ # first, since usually only that variant will add "-lpython3.8".
+ # https://docs.python.org/3/whatsnew/3.8.html#debug-build-uses-the-same-abi-as-release-build
+ SR_PKG_CHECK([python3], [SRD_PKGLIBS],
+-	[python-3.10-embed], [python-3.9-embed], [python-3.8-embed], [python-3.8 >= 3.8], [python-3.7 >= 3.7], [python-3.6 >= 3.6], [python-3.5 >= 3.5], [python-3.4 >= 3.4], [python-3.3 >= 3.3], [python-3.2 >= 3.2], [python3 >= 3.2])
++	[python-3.10-embed], [python-3.9-embed], [python-3.8-embed], [python3-embed], [python-3.8 >= 3.8], [python-3.7 >= 3.7], [python-3.6 >= 3.6], [python-3.5 >= 3.5], [python-3.4 >= 3.4], [python-3.3 >= 3.3], [python-3.2 >= 3.2], [python3 >= 3.2])
+ AS_IF([test "x$sr_have_python3" = xno],
+ 	[AC_MSG_ERROR([Cannot find Python 3 development headers.])])
+ 
+-- 
+2.30.2
+