6662 uts should only build the variant requested

*** 53,63 ****
  def             :=      TARGET= def
  def.prereq      :=      TARGET= def
  all             :=      TARGET= all
  all.prereq      :=      TARGET= all
  install         :=      TARGET= install
! install.prereq  :=      TARGET= all
  install_h       :=      TARGET= install_h
  install_h.prere :=      TARGET= install_h
  clean           :=      TARGET= clean
  clobber         :=      TARGET= clobber
  lint            :=      TARGET= lint
--- 53,63 ----
  def             :=      TARGET= def
  def.prereq      :=      TARGET= def
  all             :=      TARGET= all
  all.prereq      :=      TARGET= all
  install         :=      TARGET= install
! install.prereq  :=      TARGET= install
  install_h       :=      TARGET= install_h
  install_h.prere :=      TARGET= install_h
  clean           :=      TARGET= clean
  clobber         :=      TARGET= clobber
  lint            :=      TARGET= lint