unknown-horizons: rebuild for Python 3.8.

srcpkgs/unknown-horizons/patches/py38.patch

@@ -0,0 +1,14 @@
+--- setup.py.orig
++++ setup.py
+@@ -39,10 +39,7 @@
+ # Ensure we are in the correct directory
+ os.chdir(os.path.realpath(os.path.dirname(__file__)))
+ 
+-if platform.dist()[0].lower() in ('debian', 'ubuntu'):
+-	executable_path = 'games'
+-else:
+-	executable_path = 'bin'
++executable_path = 'bin'
+ 
+ 
+ # this trick is for setting RELEASE_VERSION if the code is cloned from git repository

srcpkgs/unknown-horizons/template

@@ -1,7 +1,7 @@
 # Template file for 'unknown-horizons'
 pkgname=unknown-horizons
 version=2019.1
-revision=2
+revision=3
 archs=noarch
 build_style=python3-module
 hostmakedepends="python3 intltool git python3-Pillow"