stppc2x: Added recipe for stppc2x, a port of puzzles to SDL.

stppc2x: Added recipe for stppc2x, a port of puzzles to SDL.

* Added dirs-fix.patch, which changes the default directories
  for the game data to a systemwide /usr/share/games/stppc2x
  setting and changes the default font to DejaVuSans-Condensed.

* Added enable-fullscreen.patch, which, um, makes the game
  fullscreen.

* Added generic-keys.patch, which changes the game keys to more
  generic ones (for devices with QWERTY keyboards) and changes
  the default control system from mouse-emulation to keyboard
  controlled.

* Added a modified Makefile, compatible to how OE handles
  CFLAGS and LDFLAGS by moving additional defines to INCS
  and LIBS, respectively.

* Added no-music.patch, which disables music. Remember to
  add libsdl-mixer to DEPENDS if you decide not to apply this.

* Added no-upper-mem.patch, which disables the OPTION_USE_UPPER_MEMORY
  hack, which makes stppc2x segfault on the Ben Nanonote and is useless
  outside of the GP2X.

* Added stppc2x-extras.tar.gz, which contains modified versions of the
  stppc2x splash screen and help messages (respective to the generic-keys
  patch above).

* Added stppc2x.desktop and accompanying stppc2x.png files.

Signed-off-by: Alex Ferguson <thoughtmonster@gmail.com>
Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>