newapkbuild: fix default check function for python3

`setup.py check` does not run package tests, it performs just some check
of the package metadata. The correct command is `setup.py test`.

newapkbuild.in

@@ -112,7 +112,7 @@ __EOF__
 
 check_python() {
 	cat >>APKBUILD<<__EOF__
-	python3 setup.py check
+	python3 setup.py test
 __EOF__
 }