lib/kcore: link it against lib/srutils

- reported by Carsten Bock

lib/kcore/Makefile

@@ -6,4 +6,7 @@ MINOR_VER=0
 BUGFIX_VER=0
 LIBS=
 
+SERLIBPATH=..
+SER_LIBS=$(SERLIBPATH)/srutils/srutils
+
 include ../../Makefile.libs