Fix ceylon/ceylon-sdk#323, ceylon-compiler part

- Change the tput sequence from `setaf 7` (set foreground to ASCII
  white) to `sgr0` (turn off all attributes)
- Change the property name to reflect the previous change ("reset" isn't
  a color)
Merge pull request #1938 from lucaswerkmeister/fixSDK323

Fix ceylon/ceylon-sdk#323, ceylon-compiler part