[R38] Update coron-4.2 tools to ROM38.
[R40] Update coron-4.2 tools to ROM40.
[R40] Update coron-4.2 tools to ROM40. Fix bug of bootimgpack.
[R40] Update tools repository to ROM40. Fix bug in recoverylink.py
[R40] Update autopatch reject hint.
[R40] Refine coron-4.0 autopatch.
[R40] Refine autopatch. Fix bug.
[ROM42] Update tools to ignore the error in filesystem_config.txt
[R40] Refine autopatch. Fix bug.
[R43]:  when call ota_from_target_files with --no_sign, do not sign the ota zip
[R43] Update autopatch.
Merge remote-tracking branch 'origin/coron-4.2' into coron-4.0-update