mark the position of dup
Lock the instruction
Add the Lock of Instruction in InsDuplica.cpp and do some change(some bugs) in LockInst.cpp and LockInst.h
Merge branch 'master' of github.com:xiehuc/IFDup
Merge pull request #3 from HaoMengHIT/master

Add the instructions of lock in IFDup,and merge your IFDup