gtk2-engine-aurora-1.5.1-bp160.1.11

- Use %autosetup macro. Allows to eliminate the usage of deprecated
  %patchN.

- added gtk2-engine-aurora-fix-glib-includes.patch in order to
  prevent glib/gtimer.h from being included directly
- use spdx.org license abbreviation

- added gtk2-engine-aurora-arrow_size.patch to fix the size
  of the menu arrows

- New package