make.bat: Fix for old files
make.bat: Fix for old files

Same fix as applied here: http://codereview.appspot.com/5761044

Fixes issue 3222.

R=golang-dev, alex.brainman, rsc
CC=golang-dev
http://codereview.appspot.com/5838043

Committer: Alex Brainman <54ba58c8441b5eff861de6b4e5ee46baf086b142@gmail.com>

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang