6662 uts should only build the variant requested

*** 68,80 ****
  include $(UTSBASE)/sparc/Makefile.sparc
  
  #
  #       Define targets
  #
! ALL_TARGET      = $(LIBGEN)
  LINT_TARGET     = $(MODULE).lint
! INSTALL_TARGET  = $(GENUNIX) $(ROOTMODULE)
  
  #
  #       Override defaults
  #
  CLEANFILES      += $(LIBSTUBS) $(LIBGEN)
--- 68,80 ----
  include $(UTSBASE)/sparc/Makefile.sparc
  
  #
  #       Define targets
  #
! ALL_TARGET      = $(LIBGEN) $(GENUNIX)
  LINT_TARGET     = $(MODULE).lint
! INSTALL_TARGET  = $(LIBGEN) $(GENUNIX) $(ROOTMODULE)
  
  #
  #       Override defaults
  #
  CLEANFILES      += $(LIBSTUBS) $(LIBGEN)