初步修正命令行编译

Signed-off-by: a1012112796 <1012112796@qq.com>

rt-thread/tools/keil.py

@@ -436,6 +436,11 @@ def ARMCC_Version():
     child = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
     stdout, stderr = child.communicate()
 
+    try:
+        stdout = stdout.decode()
+    except Exception:
+        pass
+
     '''
     example stdout:
     Product: MDK Plus 5.24