scrot: update to 1.6

Version 1.6

  [ Christopher R. Nelson ] alias @languidnights

  * Removed dependence on giblib library.

  [ Daniel T. Borelli ] alias @daltomi

  * Fixed the capture when a window is hidden behind another.
  * Fixed the capture of the edge of the focused window.
  * Avoid capturing the selection box when drag and drop quickly.
  * Fixed issue when selection reaches the end of screen.
  * New feature: resize the selection with the arrow keys.
  * New feature: support script Imlib2 commands.
  * New feature: added WM_CLASS to exclude selection mode edge from some
    composite window managers.
  * Improvement: selection option, capture the mouse cursor when the delay
    option is used.
  * Removed forced compiler options: -g -O3

  [ Guilherme Janczak ] alias @guijan

  * Removed the local implementation function: strdup.
  * Removed the local implementation function: getopt_long.
  * Removed unused file debug.h.

  [ Martin C ] alias @Cationiz3r

  * New feature: change the cursor pointer according to the movement of the
    selection.

  [ Shawn Webb ] alias @lattera

  * Fixed Control Flow Integrity complain in HardenedBSD.

(nia)