Use long options in PacmanHelper.
Fix the log message when syncing (installing) packages via pacman.
Use #pkg_cmd in PacmanHelper#has_pkg?.
Use --noprogressbar when syncing packages via pacman.
Use the pacman exit code in PacmanHelper#has_pkg?.
Merge branch 'master' into pacman for build tool dep refactoring.
Add pacman packages to 'linux build tools'.