Add PATH handling to Makefile so that 'make unit' works without cygwin-setup.sh
Add PATH handling to Makefile so that 'make unit' works without cygwin-setup.sh

thoni56/cgreen,cgreen-devs/cgreen,cgreen-devs/cgreen,thoni56/cgreen,thoni56/cgreen,thoni56/cgreen,cgreen-devs/cgreen,cgreen-devs/cgreen,thoni56/cgreen,cgreen-devs/cgreen