mx_graalpython.py add mx python3.8 convenience mnemonic

stylefix

Author: cosminbasca

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/tuple/TupleBuiltins.java

@@ -65,7 +65,6 @@
 import com.oracle.graal.python.builtins.objects.object.PythonObjectLibrary;
 import com.oracle.graal.python.builtins.objects.slice.PSlice;
 import com.oracle.graal.python.builtins.objects.str.PString;
-import com.oracle.graal.python.builtins.objects.str.StringNodes;
 import com.oracle.graal.python.builtins.objects.tuple.TupleBuiltinsClinicProviders.IndexNodeClinicProviderGen;
 import com.oracle.graal.python.nodes.ErrorMessages;
 import com.oracle.graal.python.nodes.PGuards;

mx.graalpython/mx_graalpython.py

@@ -2049,6 +2049,7 @@ def run_leak_launcher(input_args, out=None):
     'python-build-watch': [python_build_watch, ''],
     'python': [python, '[Python args|@VM options]'],
     'python3': [python, '[Python args|@VM options]'],
+    'python3.8': [python, '[Python args|@VM options]'],
     'deploy-binary-if-master': [deploy_binary_if_master, ''],
     'python-gate': [python_gate, '--tags [gates]'],
     'python-update-import': [update_import_cmd, '[--no-pull] [import-name, default: truffle]'],