lib: move compat links from targetdirs to proper makefiles

*** 31,36 ****
  # the whole 64-bit library with PIC instead of "generically" compiling
  # large parts of the 32-bit library with PIC unnecessarily.
  
  sparcv9_C_PICFLAGS = $(sparcv9_C_BIGPICFLAGS)
  
! install: all $(ROOTLIBS64) $(ROOTLINKS64)
--- 31,36 ----
  # the whole 64-bit library with PIC instead of "generically" compiling
  # large parts of the 32-bit library with PIC unnecessarily.
  
  sparcv9_C_PICFLAGS = $(sparcv9_C_BIGPICFLAGS)
  
! install: all $(ROOTLIBS64) $(ROOTLINKS64) $(ROOTCOMPATLINKS64)