[8u60] Request for Approval: 8079531: THIRD_PARTY_README update for 8u60: JSON, GIFLIB, LittleCMS

[Jeff Dinkins]

Please approve :)

Bug: https://bugs.openjdk.java.net/browse/JDK-8079531
jdk8 webrev: http://cr.openjdk.java.net/~jeff/8079531

• JSON license removed
• GIFLIB (which is included in libungif) updated to 5.1.1
• LittleCMS updated to 2.7

Reviewed by: Tim Bell, Iris Clark

Thanks,

-jeff