Add missing ILUT files and make PNG_LIBS possible to set when including.
Add missing ILUT files and make PNG_LIBS possible to set when including.

Change-Id: I8257b57d00ef2b32966ae2d3e09a2b37a2127a85
Reviewed-on: http://10.236.89.5:8080/1871
Scrum-Card: Anders Arnholm <119bbdff62cc7cf6bb8c597c367940702727c3af@mecel.se>
Reviewed-by: Anders Arnholm <119bbdff62cc7cf6bb8c597c367940702727c3af@mecel.se>
Tested-by: Anders Arnholm <119bbdff62cc7cf6bb8c597c367940702727c3af@mecel.se>

balp/DevIL,balp/DevIL,balp/DevIL,balp/DevIL,balp/DevIL