Add LDFLAGS to linker calls

Patch by Kevin McCarthy <signals42@gmail.com>

--- Makefile.in
+++ Makefile.in
@@ -74,13 +74,13 @@
 all: $(CONFIGURED) ical
 
 ical: $(LIB3) $(LIB2) $(LIB1) $(OBJS) main.o
-	$(CXXLINKER) -o $@ $(OBJS) main.o $(LIBS)
+	$(CXXLINKER) $(LDFLAGS) -o $@ $(OBJS) main.o $(LIBS)
 
 ical-bundle: $(LIB3) $(LIB2) $(LIB1) $(OBJS) mbundle.o
-	$(CXXLINKER) -o $@ $(OBJS) mbundle.o $(BLIBS)
+	$(CXXLINKER) $(LDFLAGS) -o $@ $(OBJS) mbundle.o $(BLIBS)
 
 ical-tiny: $(LIB3) $(LIB2) $(LIB1) $(OBJS) mbundle.o
-	$(CXXLINKER) -o $@ $(OBJS) mbundle.o $(TINY_BLIBS)
+	$(CXXLINKER) $(LDFLAGS) -o $@ $(OBJS) mbundle.o $(TINY_BLIBS)
 
 $(LIB1): FRC
 	@echo making in calendar