report "$CC --version" output as part of the configure summary

(cherry picked from commit a6f43574)
14 jobs for report-compiler-version-v9_11 in 7 minutes and 58 seconds (queued for 12 seconds)
Status Job ID Name Coverage
  Precheck
passed precheck:debian:sid:amd64 #56146
amd64 docker linux

00:00:19

 
  Build
passed build:centos:centos6:amd64 #56147
amd64 docker linux

00:02:23

passed build:centos:centos7:amd64 #56148
amd64 docker linux

00:02:31

passed build:debian:sid:amd64 #56149
amd64 docker linux

00:01:47

passed build:debian:sid:i386 #56150
i386 docker linux

00:02:34

 
  Test
passed install:debian:sid:amd64 #56159
amd64 docker linux

00:01:50

passed systemtest:centos:centos6:amd64 #56155
amd64 docker linux

00:04:40

passed systemtest:centos:centos7:amd64 #56156
amd64 docker linux

00:04:44

passed systemtest:debian:sid:amd64 #56157
amd64 docker linux

00:04:52

passed systemtest:debian:sid:i386 #56158
i386 docker linux

00:05:01

passed unittest:centos:centos6:amd64 #56151
amd64 docker linux

00:01:22

passed unittest:centos:centos7:amd64 #56152
amd64 docker linux

00:01:23

passed unittest:debian:sid:amd64 #56153
amd64 docker linux

00:01:20

passed unittest:debian:sid:i386 #56154
i386 docker linux

00:01:06