Remove auto-git-pull of pvt flash tool
Support flash from local files for auto_flash_from_pvt.sh.
[Ubuntu]
Merge pull request #96 from askeing/support_flash_from_local_files

Support flash from local files for auto_flash_from_pvt.sh.
Merge pull request #98 from askeing/remove-auto-git-pull-of-pvt-flash-tool

Remove auto-git-pull of pvt flash tool