Makefile: core stats enabled for kamailio flavor

Makefile.defs

@@ -654,7 +654,7 @@ ifeq ($(TLS_HOOKS), 1)
 	C_DEFS+= -DUSE_TLS -DTLS_HOOKS
 endif
 ifeq ($(KMSTATS), 1)
-	C_DEFS+= -DSTATISTICS
+	C_DEFS+= -DUSE_CORE_STATS -DSTATISTICS
 endif
 ifeq ($(FMSTATS), 1)
 	C_DEFS+= -DMALLOC_STATS