retain diff output if clang-format changes something

It's major PITA trying to guess what exactly clang-format has changed,
so how CI stores patch file with changes which can be applied locally if
needed.

(cherry picked from commit ca4393fc)
81 jobs for !5553 with pspacek/clang-format-v9_16 in 1 minute and 54 seconds (queued for 18 seconds)
latest detached
Status Job ID Name Coverage
  Precheck
passed autoreconf #2082780
amd64 linux

00:00:18

passed clang-format #2082782
amd64 linux

00:00:19

canceled coccinelle #2082783
amd64 linux

00:01:37

passed danger #2082860
amd64 linux

00:00:16

passed misc #2082781
amd64 linux

00:00:20

passed tarball-create #2082785
amd64 linux

00:00:20

canceled danger #2082859
amd64 linux

00:00:02

failed danger #2082784
amd64 linux

00:00:20

 
  Build
canceled clang:asan #2082799
amd64 linux

00:01:07

canceled clang:buster:amd64 #2082803
amd64 linux

00:01:06

canceled clang:freebsd12:amd64 #2082806
amd64 libvirt

00:01:04

canceled clang:freebsd13:amd64 #2082807
amd64 libvirt

00:01:04

canceled clang:openbsd:amd64 #2082808
amd64 libvirt

00:01:03

canceled clang:tsan #2082801
amd64 linux

00:01:07

canceled gcc:alpine3.14:amd64 #2082786
amd64 linux

00:01:10

canceled gcc:asan #2082798
amd64 linux

00:01:07

canceled gcc:bionic:amd64 #2082796
amd64 linux

00:01:08

canceled gcc:bullseye:amd64 #2082790
amd64 linux

00:01:09

canceled gcc:buster:amd64 #2082789
amd64 linux

00:01:10

canceled gcc:buster:amd64cross32 #2082791
amd64 linux

00:01:09

canceled gcc:focal:amd64 #2082797
amd64 linux

00:01:08

canceled gcc:mutexatomics #2082802
amd64 linux

00:01:06

canceled gcc:oraclelinux7:amd64 #2082787
amd64 linux

00:01:10

canceled gcc:oraclelinux8:amd64 #2082788
amd64 linux

00:01:10

canceled gcc:out-of-tree #2082793
amd64 linux

00:01:09

canceled gcc:sid:amd64 #2082792
amd64 linux

00:01:09

canceled gcc:softhsm2.4 #2082804
amd64 linux

00:01:06

canceled gcc:softhsm2.6 #2082805
amd64 linux

00:01:06

canceled gcc:tarball #2082794
amd64 linux

00:01:08

canceled gcc:tsan #2082800
amd64 linux

00:01:07

canceled gcc:tumbleweed:amd64 #2082795
amd64 linux

00:01:08

passed msvc:windows:amd64 #2082810
amd64 windows

00:01:17

canceled nolibtool:sid:amd64 #2082809
amd64 linux

00:01:05

 
  Unit
canceled unit:clang:asan #2082822
amd64 linux

canceled unit:clang:buster:amd64 #2082826
amd64 linux

canceled unit:clang:freebsd12:amd64 #2082829
amd64 libvirt

canceled unit:clang:freebsd13:amd64 #2082830
amd64 libvirt

canceled unit:clang:tsan #2082824
amd64 linux

canceled unit:gcc:alpine3.14:amd64 #2082811
amd64 linux

canceled unit:gcc:asan #2082821
amd64 linux

canceled unit:gcc:bionic:amd64 #2082819
amd64 linux

canceled unit:gcc:bullseye:amd64 #2082815
amd64 linux

canceled unit:gcc:buster:amd64 #2082814
amd64 linux

canceled unit:gcc:buster:amd64cross32 #2082816
amd64 linux

canceled unit:gcc:focal:amd64 #2082820
amd64 linux

canceled unit:gcc:mutexatomics #2082825
amd64 linux

canceled unit:gcc:oraclelinux7:amd64 #2082812
amd64 linux

canceled unit:gcc:oraclelinux8:amd64 #2082813
amd64 linux

canceled unit:gcc:sid:amd64 #2082817
amd64 linux

canceled unit:gcc:softhsm2.4 #2082827
amd64 linux

canceled unit:gcc:softhsm2.6 #2082828
amd64 linux

canceled unit:gcc:tsan #2082823
amd64 linux

canceled unit:gcc:tumbleweed:amd64 #2082818
amd64 linux

canceled unit:nolibtool:sid:amd64 #2082831
amd64 linux

 
  System
canceled system:clang:asan #2082843
amd64 linux

canceled system:clang:buster:amd64 #2082847
amd64 linux

canceled system:clang:freebsd12:amd64 #2082850
amd64 libvirt

canceled system:clang:freebsd13:amd64 #2082851
amd64 libvirt

canceled system:clang:tsan #2082845
amd64 linux

canceled system:gcc:alpine3.14:amd64 #2082832
amd64 linux

canceled system:gcc:asan #2082842
amd64 linux

canceled system:gcc:bionic:amd64 #2082840
amd64 linux

canceled system:gcc:bullseye:amd64 #2082836
amd64 linux

canceled system:gcc:buster:amd64 #2082835
amd64 linux

canceled system:gcc:buster:amd64cross32 #2082837
amd64 linux

canceled system:gcc:focal:amd64 #2082841
amd64 linux

canceled system:gcc:mutexatomics #2082846
amd64 linux

canceled system:gcc:oraclelinux7:amd64 #2082833
amd64 linux

canceled system:gcc:oraclelinux8:amd64 #2082834
amd64 linux

canceled system:gcc:sid:amd64 #2082838
amd64 linux

canceled system:gcc:softhsm2.4 #2082848
amd64 linux

canceled system:gcc:softhsm2.6 #2082849
amd64 linux

canceled system:gcc:tsan #2082844
amd64 linux

canceled system:gcc:tumbleweed:amd64 #2082839
amd64 linux

canceled system:nolibtool:sid:amd64 #2082852
amd64 linux

 
  Docs
canceled docs #2082853
amd64 linux

00:01:05

 
  Postcheck
passed cppcheck #2082857
amd64 linux

00:00:35

passed flake8 #2082854
amd64 linux

00:00:33

canceled gcov #2082858
amd64 linux

passed pylint #2082855
amd64 linux

00:00:37

canceled scan-build #2082856
amd64 linux

00:01:04