Add compatibility stdatomic.h header for Windows

10 jobs for 10-require-atomics in 9 minutes and 4 seconds (queued for 24 seconds)
latest
Status Job ID Name Coverage
  Precheck
passed #13985
amd64 docker linux
precheck:debian:sid:amd64

00:00:11

 
  Build
passed #13986
amd64 docker linux
build:clang:debian:sid:amd64

00:03:00

passed #13988
i386 docker linux
build:clang:debian:sid:i386

00:03:20

passed #13987
amd64 docker linux
build:debian:sid:amd64

00:02:47

passed #13989
i386 docker linux
build:debian:sid:i386

00:03:00

 
  Test
passed #13993
amd64 docker linux
systemtest:debian:sid:amd64

00:05:17

passed #13994
i386 docker linux
systemtest:debian:sid:i386

00:05:31

passed #13991
amd64 docker linux
unittest:clang:debian:sid:amd64

00:04:09

passed #13990
amd64 docker linux
unittest:debian:sid:amd64

00:04:08

passed #13992
i386 docker linux
unittest:debian:sid:i386

00:04:10