Makefile.include: Remove --cref from linking flags

Seem to cause internal linker errors and linker segfaults under some
circumstances when using gold as the linker.

Makefile.include

@@ -310,7 +310,7 @@ LINKFLAGPREFIX ?= -Wl,
 
 DIRS += $(EXTERNAL_MODULE_DIRS)
 
-_LINK = $(if $(CPPMIX),$(CXX),$(LINK)) $(UNDEF) $(LINKFLAGPREFIX)--start-group $(BASELIBS) -lm $(LINKFLAGPREFIX)--end-group  $(LINKFLAGPREFIX)-Map=$(BINDIR)/$(APPLICATION).map $(LINKFLAGPREFIX)--cref $(LINKFLAGS)
+_LINK = $(if $(CPPMIX),$(CXX),$(LINK)) $(UNDEF) $(LINKFLAGPREFIX)--start-group $(BASELIBS) -lm $(LINKFLAGPREFIX)--end-group  $(LINKFLAGPREFIX)-Map=$(BINDIR)/$(APPLICATION).map $(LINKFLAGS)
 
 ifeq ($(BUILD_IN_DOCKER),1)
 link: ..in-docker-container