Bug#1023587: plib: hardcoded dependency on freeglut3

[Sebastian Ramacher]

Source: plib
Version: 1.8.5-13
Severity: serious

plib has a hardcoded depenedency on freeglut3. As we are currently
performing the freeglut3 to libglut3.12 transition, please fix this.

Cheers
-- 
Sebastian Ramacher