silence "missing print.h" warning

(cherry picked from commit 3c18b7d3)
14 jobs for silence-warning-v9_11 in 10 minutes and 11 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Precheck
passed precheck:debian:sid:amd64 #49743
amd64 docker linux

00:00:18

 
  Build
passed build:centos:centos6:amd64 #49744
amd64 docker linux

00:03:09

passed build:centos:centos7:amd64 #49745
amd64 docker linux

00:03:23

passed build:debian:sid:amd64 #49746
amd64 docker linux

00:02:44

passed build:debian:sid:i386 #49747
i386 docker linux

00:02:36

 
  Test
passed install:debian:sid:amd64 #49756
amd64 docker linux

00:03:21

passed systemtest:centos:centos6:amd64 #49752
amd64 docker linux

00:05:07

passed systemtest:centos:centos7:amd64 #49753
amd64 docker linux

00:04:58

passed systemtest:debian:sid:amd64 #49754
amd64 docker linux

00:04:43

passed systemtest:debian:sid:i386 #49755
i386 docker linux

00:05:06

passed unittest:centos:centos6:amd64 #49748
amd64 docker linux

00:01:11

passed unittest:centos:centos7:amd64 #49749
amd64 docker linux

00:01:03

passed unittest:debian:sid:amd64 #49750
amd64 docker linux

00:01:05

passed unittest:debian:sid:i386 #49751
i386 docker linux

00:00:56