Cleanup and python 3.13

sci-libs/libsigrok/files/libsigrok-0.5.2-swig-4.1.patch

@@ -0,0 +1,11 @@
+https://bugs.gentoo.org/878395
+--- a/bindings/cxx/enums.py
++++ b/bindings/cxx/enums.py
+@@ -73,6 +73,8 @@
+ code = open(os.path.join(outdirname, 'cxx/enums.cpp'), 'w')
+ swig = open(os.path.join(outdirname, 'swig/enums.i'), 'w')
+ 
++print('%include "attribute.i" \n', file=swig)
++
+ for file in (header, code):
+     print("/* Generated file - edit enums.py instead! */", file=file)