Revert "fixed download URL to fit current AUR directory structure"

This reverts commit b92c14d4d90468021541f8ab5d59edf991f5b183.
Revert "install needed dependencies for build step"

This reverts commit f97382dcf9871da4183e96611f99d3884cb610a5.

Undo hardcoded '-s' argument as there is already an option to pass additional arguments to makepkg