Extend tag 'python-cpyext'.

Author: fangerer

mx.graalpython/mx_graalpython.py

@@ -393,8 +393,13 @@ def graalpython_gate_runner(args, tasks):
 
     with Task('GraalPython C extension tests', tasks, tags=[GraalPythonTags.cpyext]) as task:
         if task:
+            # we deliberately added this to test the combination of Sulong and 'mx_unittest'
+            unittest(['--regex', re.escape('com.oracle.graal.python.test.module.MemoryviewTest'),
+                      "-Dgraal.TraceTruffleCompilation=true"])
+
             gate_unittests(subdir="cpyext/")
 
+
     with Task('GraalPython C extension managed tests', tasks, tags=[GraalPythonTags.cpyext_managed]) as task:
         if task:
             mx.run_mx(["--dynamicimports", "sulong-managed", "python-gate-unittests", "--llvm.configuration=managed", "--subdir=cpyext", "--"])