Drop -O3 and allow user to specify their optimizations.

--- a/cstool/Makefile
+++ b/cstool/Makefile
@@ -1,13 +1,14 @@
 # Makefile for Cstool of Capstone Disassembly Engine
 
 include ../functions.mk
+include ../config.mk
 
 .PHONY: clean all
 
 LIBNAME = capstone
 
 CFLAGS += -I../include -I.
-LDFLAGS += -O3 -Wall -L.. -l$(LIBNAME)
+LDFLAGS += -Wall -L.. -l$(LIBNAME)
 
 TARGET = cstool
 SOURCES := $(wildcard *.c)