Fix error in tramp-sh.el

* lisp/net/tramp-sh.el (tramp-sh-handle-make-process):
Revert "simplification", which was an error.
2 jobs for master in 42 minutes and 26 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #1335
test-all

00:42:26

passed #1336
test-filenotify-gio

00:27:54

 
Name Stage Failure
failed
test-all Test
Makefile:313: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:288: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:962: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1