Flush test progress.

Author: fangerer

graalpython/com.oracle.graal.python.test/src/graalpytest.py

@@ -131,7 +131,7 @@ def get_useful_frame(self, tb):
     def run_safely(self, func, print_immediately=False):
         if verbose:
             with print_lock:
-                print(u"\n\t\u21B3 ", func.__name__, " ", end="")
+                print(u"\n\t\u21B3 ", func.__name__, " ", end="", flush=True)
         try:
             func()
         except BaseException as e: