File mesa_use_python313.patch of Package Mesa

diff -uNr mesa.orig/meson.build mesa/meson.build
--- mesa.orig/meson.build	2025-01-17 15:38:15.422614026 +0100
+++ mesa/meson.build	2025-01-17 15:40:59.894012950 +0100
@@ -919,7 +919,7 @@
 endif
 
 # On Windows, a venv has no versioned aliased to 'python'.
-prog_python = find_program('python3', 'python', version : '>= 3.8')
+prog_python = find_program('python3.13', 'python', version : '>= 3.8')
 
 has_mako = run_command(
   prog_python, '-c',