consistently remove $@-t before redirecting to it

consistently remove $@-t before redirecting to it

* modules/argz: Remove $@-t and $@ before redirecting to the former.
* modules/alloca-opt: Likewise.
* modules/byteswap: Likewise.
* modules/fnmatch: Likewise.
* modules/getopt-posix: Likewise.
* modules/glob: Likewise.
* modules/poll: Likewise.
* modules/posix_spawnp-tests: Likewise.
* modules/sys_socket: Likewise.
* modules/sysexits: Likewise.