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 #49743
amd64 docker linux
precheck:debian:sid:amd64

00:00:18

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

00:03:09

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

00:03:23

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

00:02:44

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

00:02:36

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

00:03:21

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

00:05:07

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

00:04:58

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

00:04:43

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

00:05:06

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

00:01:11

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

00:01:03

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

00:01:05

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

00:00:56