iccjpeg: Add README with license information.

third_party/iccjpeg/iccjpeg.c

 /*
  * iccprofile.c
  *
+ * Copyright (C) 1991-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
  * This file provides code to read and write International Color Consortium
  * (ICC) device profiles embedded in JFIF JPEG image files.  The ICC has
  * defined a standard format for including such data in JPEG "APP2" markers.
  * The code given here does not know anything about the internal structure
  * of the ICC profile data; it just knows how to put the profile data into
  * a JPEG file being written, or get it back out when reading.
  *
  * This code depends on new features added to the IJG JPEG library as of
  * IJG release 6b; it will not compile or work with older IJG versions.
  *
@@ skipping 225 matching lines @@
         *dst_ptr++ = *src_ptr++;
       }
     }
   }
 
   *icc_data_ptr = icc_data;
   *icc_data_len = total_length;
 
   return TRUE;
 }