Fix the "dnssec" system test on Windows

Make sure carriage return characters are stripped from awk input to
enable the "dnssec" system test to pass on Windows.

(cherry picked from commit 451484b8)
66 jobs for !2903 with michal/fix-the-dnssec-system-test-on-windows-v9_14 in 28 seconds (queued for 7 seconds)
detached
Status Job ID Name Coverage
  Precheck
canceled #569109
amd64 linux
🐞:sid:amd64

00:00:27

passed #569107
amd64 linux
autoreconf:sid:amd64

00:00:27

passed #569108
amd64 linux
misc:sid:amd64

00:00:22

 
  Build
canceled #569124
amd64 linux
asan:sid:amd64

canceled #569128
amd64 freebsd
clang:freebsd11.3:amd64

canceled #569129
amd64 freebsd
clang:freebsd12.0:amd64

canceled #569130
amd64 openbsd
clang:openbsd6.5:amd64

canceled #569125
amd64 linux
clang:stretch:amd64

canceled #569126
i386 linux
clang:stretch:i386

canceled #569110
amd64 linux
gcc:alpine3.11:amd64

canceled #569123
amd64 linux
gcc:bionic:amd64

canceled #569116
amd64 linux
gcc:buster:amd64

canceled #569111
amd64 linux
gcc:centos6:amd64

canceled #569112
amd64 linux
gcc:centos7:amd64

canceled #569113
amd64 linux
gcc:centos8:amd64

canceled #569121
amd64 linux
gcc:fedora31:amd64

canceled #569114
amd64 linux
gcc:jessie:amd64

canceled #569117
amd64 linux
gcc:sid:amd64

canceled #569119
i386 linux
gcc:sid:i386

canceled #569115
amd64 linux
gcc:stretch:amd64

canceled #569120
amd64 linux
gcc:tumbleweed:amd64

canceled #569122
amd64 linux
gcc:xenial:amd64

canceled #569132
amd64 windows
msvc:windows:amd64

canceled #569131
amd64 linux
nolibtool:sid:amd64

canceled #569118
amd64 linux
oot:sid:amd64

canceled #569127
amd64 linux
pkcs11:sid:amd64

 
  Unit
canceled #569146
amd64 linux
unit:asan:sid:amd64

canceled #569149
amd64 freebsd
unit:clang:freebsd11.3:amd64

canceled #569150
amd64 freebsd
unit:clang:freebsd12.0:amd64

canceled #569147
amd64 linux
unit:clang:stretch:amd64

canceled #569133
amd64 linux
unit:gcc:alpine3.11:amd64

canceled #569145
amd64 linux
unit:gcc:bionic:amd64

canceled #569139
amd64 linux
unit:gcc:buster:amd64

canceled #569134
amd64 linux
unit:gcc:centos6:amd64

canceled #569135
amd64 linux
unit:gcc:centos7:amd64

canceled #569136
amd64 linux
unit:gcc:centos8:amd64

canceled #569143
amd64 linux
unit:gcc:fedora31:amd64

canceled #569137
amd64 linux
unit:gcc:jessie:amd64

canceled #569140
amd64 linux
unit:gcc:sid:amd64

canceled #569141
i386 linux
unit:gcc:sid:i386

canceled #569138
amd64 linux
unit:gcc:stretch:amd64

canceled #569142
amd64 linux
unit:gcc:tumbleweed:amd64

canceled #569144
amd64 linux
unit:gcc:xenial:amd64

canceled #569151
amd64 linux
unit:nolibtool:sid:amd64

canceled #569148
amd64 linux
unit:pkcs11:sid:amd64

 
  System
canceled #569165
amd64 linux
system:asan:sid:amd64

canceled #569167
amd64 freebsd
system:clang:freebsd11.3:amd64

canceled #569168
amd64 freebsd
system:clang:freebsd12.0:amd64

canceled #569152
amd64 linux
system:gcc:alpine3.11:amd64

canceled #569164
amd64 linux
system:gcc:bionic:amd64

canceled #569158
amd64 linux
system:gcc:buster:amd64

canceled #569153
amd64 linux
system:gcc:centos6:amd64

canceled #569154
amd64 linux
system:gcc:centos7:amd64

canceled #569155
amd64 linux
system:gcc:centos8:amd64

canceled #569162
amd64 linux
system:gcc:fedora31:amd64

canceled #569156
amd64 linux
system:gcc:jessie:amd64

canceled #569159
amd64 linux
system:gcc:sid:amd64

canceled #569160
i386 linux
system:gcc:sid:i386

canceled #569157
amd64 linux
system:gcc:stretch:amd64

canceled #569161
amd64 linux
system:gcc:tumbleweed:amd64

canceled #569163
amd64 linux
system:gcc:xenial:amd64

canceled #569169
amd64 linux
system:nolibtool:sid:amd64

canceled #569166
amd64 linux
system:pkcs11:sid:amd64

 
  Docs
canceled #569170
amd64 linux
docs:sid:amd64

 
  Postcheck
canceled #569172
amd64 linux
cppcheck:gcc:sid:amd64

canceled #569171
amd64 linux
scan-build:buster:amd64