Bug 1093 - NEWT PointerIcon swizzled on X11 and OSX; WindowIcon swizzled on OSX ([R] -> [B])

Following mistakes were made in native PixelFormat
for PointerIcon and WindowIcon:

PointerIcon:
  X11: RGBA8888 -> BGRA8888
  OSX: BGRA8888 -> RGBA8888

WindowIcon:
  OSX: BGRA8888 -> RGBA8888

Test case: TestWindowAndPointerIconNEWT

(requires visual validation)

+++

Summary:

PointerIcon:
  BGRA8888: X11, Win32
  RGBA8888: OSX

WindowIcon:
  BGRA8888: X11, Win32
  RGBA8888: OSX

+++

Reported by 'LT'
  <http://forum.jogamp.org/Mac-OSX-newt-pointer-and-window-icon-displays-incorrectly-tp4033294.html>