lib: move compat links from targetdirs to proper makefiles

*** 22,29 ****
  
  include ../Makefile.com
  
  SRCS            = $(SRCS_mvec)
  
! install: all $(ROOTLIBS) $(ROOTLINKS)
  
  include $(SRC)/lib/libm/Makefile.targ
--- 22,29 ----
  
  include ../Makefile.com
  
  SRCS            = $(SRCS_mvec)
  
! install: all $(ROOTLIBS) $(ROOTLINKS) $(ROOTCOMPATLINKS)
  
  include $(SRC)/lib/libm/Makefile.targ