astro/openuniverse: Fix build on 13

ld: error: undefined symbol: ftime

referenced by ou.cpp

ou.o:(Idle())

did you mean: ctime
defined in: /lib/libc.so.7

PR: 289876
Fixes: c5f57c13a292 (Fix freeglut runtime error)
MFH: 2025Q3
(cherry picked from commit 5b59069e2331755ac47a9a0c7129ea529b46afa9)