Windows: Fixed `stout/os/windows/ls.hpp` header guard.
Windows: Fixed `stout/os/windows/ls.hpp` header guard.

There was a typo in the `#define`, the `L` was misplaced. Surprised
this hasn't broken anything yet.

dforsyth/mesos,asamerh4/mesos,Gilbert88/mesos,chhsia0/mesos,dforsyth/mesos,dforsyth/mesos,asamerh4/mesos,gsantovena/mesos,andschwa/mesos,andschwa/mesos,asamerh4/mesos,gsantovena/mesos,reneploetz/mesos,abudnik/mesos,asamerh4/mesos,Gilbert88/mesos,jpeach/mesos,kaysoky/mesos,gsantovena/mesos,kaysoky/mesos,abudnik/mesos,jpeach/mesos,andschwa/mesos,Gilbert88/mesos,abudnik/mesos,reneploetz/mesos,andschwa/mesos,gsantovena/mesos,andschwa/mesos,gsantovena/mesos,asamerh4/mesos,asamerh4/mesos,kaysoky/mesos,reneploetz/mesos,chhsia0/mesos,jpeach/mesos,kaysoky/mesos,Gilbert88/mesos,Gilbert88/mesos,gsantovena/mesos,chhsia0/mesos,reneploetz/mesos,abudnik/mesos,andschwa/mesos,chhsia0/mesos,dforsyth/mesos,kaysoky/mesos,abudnik/mesos,dforsyth/mesos,kaysoky/mesos,andschwa/mesos,jpeach/mesos,Gilbert88/mesos,Gilbert88/mesos,reneploetz/mesos,jpeach/mesos,chhsia0/mesos,dforsyth/mesos,dforsyth/mesos,jpeach/mesos,chhsia0/mesos,kaysoky/mesos,chhsia0/mesos,abudnik/mesos,asamerh4/mesos,gsantovena/mesos,reneploetz/mesos,jpeach/mesos,abudnik/mesos,reneploetz/mesos