[CI] Update docker image ci_cpu,i386 to include verilator (#3738)

Author: tqchen

Jenkinsfile

@@ -40,8 +40,8 @@
 //
 ci_lint = "tvmai/ci-lint:v0.51"
 ci_gpu = "tvmai/ci-gpu:v0.54"
-ci_cpu = "tvmai/ci-cpu:v0.51"
-ci_i386 = "tvmai/ci-i386:v0.51"
+ci_cpu = "tvmai/ci-cpu:v0.52"
+ci_i386 = "tvmai/ci-i386:v0.52"
 
 // tvm libraries
 tvm_runtime = "build/libtvm_runtime.so, build/config.cmake"