Makefile: Applied changes suggested by Reijo

Makefile

@@ -1,6 +1,7 @@
 SRCS=CheckBufferOverrun.cpp  CheckClass.cpp  CheckHeaders.cpp  CheckMemoryLeak.cpp  CheckOther.cpp  CommonCheck.cpp  preprocessor.cpp	tokenize.cpp
 OBJS=$(SRCS:%.cpp=%.o)
 TESTS=testbufferoverrun.o	testcharvar.o	testconstructors.o	testdivision.o	testmemleak.o	testother.o	testpreprocessor.o	testunusedvar.o
+BIN = ${DESTDIR}/usr/bin
 
 %.o:	%.cpp
 	g++ -Wall -pedantic -g -I. -o $@ -c $^
@@ -11,3 +12,6 @@ test:	${OBJS} testrunner.o	testsuite.o	${TESTS}
 	g++ -Wall -g -o testrunner $^
 clean:
 	rm -f *.o cppcheck_test cppcheck
+install:	cppcheck
+	install -d ${BIN}
+	install cppcheck ${BIN}