lib: move compat links from targetdirs to proper makefiles

@@ -21,8 +21,8 @@
 # registers, ending up with better-than-ieee precision.
 #
 CFLAGS          += -_gcc=-ffloat-store
 $(OBJS_M9XSSE)  := CFLAGS += -xarch=sse2
 
-install:        all $(ROOTLIBS) $(ROOTLINKS) $(ROOTLINT)
+install:        all $(ROOTLIBS) $(ROOTLINKS) $(ROOTLINT) $(ROOTCOMPATLINKS)
 
 include ../Makefile.targ