Update vcast_exec.py

Author: TimSVector

vcast_exec.py

@@ -486,6 +486,8 @@ def runExec(self):
         print ("exiting...")
         sys.exit(-1)
 
+    for key in os.environ.keys():
+        print(f"{key}={os.environ[key]}")
 
     vcExec = VectorCASTExecute(args)