[201803] Install specific version of ctypesgen to fix build (#3576)

jleveque · lguohan · commit b6ae12bcc850 · 2019-10-08T12:41:37.000-07:00
Port of #3434 to the 201803 branch.
diff --git a/sonic-slave/Dockerfile b/sonic-slave/Dockerfile
@@ -240,7 +240,7 @@ RUN python2 -m pip install -U pip==9.0.3
 
 # For p4 build
 RUN pip install \
-        ctypesgen \
+        ctypesgen==0.r125 \
         crc16
 
 # For sonic config engine testing
