make: translate using gettext, rather than the unmaintainable catgets

*** 11,33 ****
  
  # Copyright 2015, Richard Lowe.
  
  SUBDIRS=bsd \
          makestate \
-         mksdmsi18n \
          mksh \
          vroot
  
  all     :=      TARGET = all
  install :=      TARGET = install
  clean   :=      TARGET = clean
  clobber :=      TARGET = clobber
  lint    :=      TARGET = lint
  
  .KEEP_STATE:
  
! all clean clobber lint install: $(SUBDIRS)
  
  $(SUBDIRS):     FRC
          @cd $@; pwd; $(MAKE) $(TARGET)
  
  FRC:
--- 11,33 ----
  
  # Copyright 2015, Richard Lowe.
  
  SUBDIRS=bsd \
          makestate \
          mksh \
          vroot
  
  all     :=      TARGET = all
  install :=      TARGET = install
  clean   :=      TARGET = clean
  clobber :=      TARGET = clobber
  lint    :=      TARGET = lint
+ _msg    :=      TARGET = _msg
  
  .KEEP_STATE:
  
! all clean clobber lint install _msg: $(SUBDIRS)
  
  $(SUBDIRS):     FRC
          @cd $@; pwd; $(MAKE) $(TARGET)
  
  FRC: