python-incremental: add test-version.sh generic version-check override

The incremental CLI requires an "update" subcommand and prints a usage
error instead of a version for the flags the generic check probes, so it
fails generic tests (e.g. when python3 is bumped). Override it; test.sh
still covers functionality.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

lang/python/python-incremental/test-version.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# shellcheck shell=busybox
+
+case "$PKG_NAME" in
+python3-incremental | python3-incremental-src)
+	exit 0
+	;;
+*)
+	echo "Untested package: $PKG_NAME" >&2
+	exit 1
+	;;
+esac