Fxed Makefile so that make clean works even when targets have not been made yet
Fxed Makefile so that make clean works even when targets have not been made yet

git-svn-id: 03a8048b5ee8463be5048a3801110fb50f378627@4389 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd

kmdouglass/Micro-Manager,kmdouglass/Micro-Manager