python3: move version checks to override

Move existing version checks into override and add explicit package checks.

Signed-off-by: George Sapkin <george@sapk.in>

lang/python/python3/test-version.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+
+# shellckeck shell=busybox
+
+case "$PKG_NAME" in
+python3|\
+python3-base|\
+python3-light)
+	python3 --version | grep -Fx "Python $PKG_VERSION"
+	;;
+
+python3-asyncio|\
+python3-base-src|\
+python3-codecs|\
+python3-ctypes|\
+python3-dbm|\
+python3-decimal|\
+python3-dev|\
+python3-light-src|\
+python3-logging|\
+python3-lzma|\
+python3-multiprocessing|\
+python3-ncurses|\
+python3-openssl|\
+python3-pydoc|\
+python3-readline|\
+python3-sqlite3|\
+python3-unittest|\
+python3-urllib|\
+python3-uuid|\
+python3-venv|\
+python3-xml)
+	exit 0
+	;;
+
+*)
+	echo "Untested package: $PKG_NAME" >&2
+	exit 1
+	;;
+esac