Make pairwise-testing.sh execution more verbose

Running pairwise-testing.sh may be interrupted abruptly and we may not
have a clue about what command has been executing. Expanding script
commands with '-x' should help determine that.
74 jobs for !4258 with mnowak/make-pairwise-more-verbose in 10 seconds (queued for 7 seconds)
detached
Status Job ID Name Coverage
  Autoconf
canceled #1216829
amd64 linux
autoreconf

00:00:09

 
  Precheck
canceled #1216831
amd64 linux
clang-format

00:00:09

canceled #1216832
amd64 linux
coccinelle

00:00:08

canceled #1216833
amd64 linux
danger

00:00:08

canceled #1216830
amd64 linux
misc

00:00:09

canceled #1216834
amd64 linux
tarball-create

 
  Build
canceled #1216847
amd64 linux
clang:asan

canceled #1216851
amd64 linux
clang:buster:amd64

canceled #1216854
amd64 libvirt
clang:freebsd11:amd64

canceled #1216855
amd64 libvirt
clang:freebsd12:amd64

canceled #1216856
amd64 libvirt
clang:openbsd:amd64

canceled #1216849
amd64 linux
clang:tsan

canceled #1216835
amd64 linux
gcc:alpine3.12:amd64

canceled #1216846
amd64 linux
gcc:asan

canceled #1216839
amd64 linux
gcc:buster:amd64

canceled #1216836
amd64 linux
gcc:centos7:amd64

canceled #1216837
amd64 linux
gcc:centos8:amd64

canceled #1216845
amd64 linux
gcc:focal:amd64

canceled #1216850
amd64 linux
gcc:mutexatomics

canceled #1216841
amd64 linux
gcc:out-of-tree

canceled #1216840
amd64 linux
gcc:sid:amd64

canceled #1216842
i386 linux
gcc:sid:i386

canceled #1216852
amd64 linux
gcc:softhsm2.4

canceled #1216853
amd64 linux
gcc:softhsm2.6

canceled #1216838
amd64 linux
gcc:stretch:amd64

canceled #1216848
amd64 linux
gcc:tsan

canceled #1216843
amd64 linux
gcc:tumbleweed:amd64

canceled #1216844
amd64 linux
gcc:xenial:amd64

canceled #1216857
amd64 windows
msvc:windows:amd64

00:00:06

 
  Unit
canceled #1216869
amd64 linux
unit:clang:asan

canceled #1216873
amd64 linux
unit:clang:buster:amd64

canceled #1216876
amd64 libvirt
unit:clang:freebsd11:amd64

canceled #1216877
amd64 libvirt
unit:clang:freebsd12:amd64

canceled #1216871
amd64 linux
unit:clang:tsan

canceled #1216858
amd64 linux
unit:gcc:alpine3.12:amd64

canceled #1216868
amd64 linux
unit:gcc:asan

canceled #1216862
amd64 linux
unit:gcc:buster:amd64

canceled #1216859
amd64 linux
unit:gcc:centos7:amd64

canceled #1216860
amd64 linux
unit:gcc:centos8:amd64

canceled #1216867
amd64 linux
unit:gcc:focal:amd64

canceled #1216872
amd64 linux
unit:gcc:mutexatomics

canceled #1216863
amd64 linux
unit:gcc:sid:amd64

canceled #1216864
i386 linux
unit:gcc:sid:i386

canceled #1216874
amd64 linux
unit:gcc:softhsm2.4

canceled #1216875
amd64 linux
unit:gcc:softhsm2.6

canceled #1216861
amd64 linux
unit:gcc:stretch:amd64

canceled #1216870
amd64 linux
unit:gcc:tsan

canceled #1216865
amd64 linux
unit:gcc:tumbleweed:amd64

canceled #1216866
amd64 linux
unit:gcc:xenial:amd64

 
  System
canceled #1216889
amd64 linux
system:clang:asan

canceled #1216893
amd64 linux
system:clang:buster:amd64

canceled #1216896
amd64 libvirt
system:clang:freebsd11:amd64

canceled #1216897
amd64 libvirt
system:clang:freebsd12:amd64

canceled #1216891
amd64 linux allowed to fail
system:clang:tsan

canceled #1216878
amd64 linux
system:gcc:alpine3.12:amd64

canceled #1216888
amd64 linux
system:gcc:asan

canceled #1216882
amd64 linux
system:gcc:buster:amd64

canceled #1216879
amd64 linux
system:gcc:centos7:amd64

canceled #1216880
amd64 linux
system:gcc:centos8:amd64

canceled #1216887
amd64 linux
system:gcc:focal:amd64

canceled #1216892
amd64 linux
system:gcc:mutexatomics

canceled #1216883
amd64 linux
system:gcc:sid:amd64

canceled #1216884
i386 linux
system:gcc:sid:i386

canceled #1216894
amd64 linux
system:gcc:softhsm2.4

canceled #1216895
amd64 linux
system:gcc:softhsm2.6

canceled #1216881
amd64 linux
system:gcc:stretch:amd64

canceled #1216890
amd64 linux allowed to fail
system:gcc:tsan

canceled #1216885
amd64 linux
system:gcc:tumbleweed:amd64

canceled #1216886
amd64 linux
system:gcc:xenial:amd64

 
  Docs
canceled #1216898
amd64 linux
docs

 
  Postcheck
canceled #1216902
amd64 linux
cppcheck

canceled #1216899
amd64 linux
flake8

canceled #1216900
amd64 linux
pylint

canceled #1216901
amd64 linux
scan-build