Check for go/scm mtime ordering rather than equality.

* am/guilec (install-data-hook): Remove.
  (guile_install_go_files): New variable.
  ($(guile_install_go_files)): New dependency.

* libguile/load.c (compiled_is_fresh): Check for ordering of STAT_SOURCE
  and STAT_COMPILED, not equality.

* module/ice-9/boot-9.scm (load): Ditto.

* module/system/base/compile.scm (call-with-output-file/atomic): Don't
  set the timestamp of TEMPLATE.

module/system/base/compile.scm

@@ -81,11 +81,6 @@
            (proc tmp)
            (chmod tmp (logand #o0666 (lognot (umask))))
            (close-port tmp)
-           (if reference
-               (let ((st (stat reference)))
-                 (utime template
-                        (stat:atime st) (stat:mtime st)
-                        (stat:atimensec st) (stat:mtimensec st))))
            (rename-file template filename))
          (lambda args
            (delete-file template)))))))