Update Eigen to commit:171bd08ca987987c3c50f0fa5dd8914bdd42dd3b CHANGELOG ========= 171bd08ca - fix 2849 db85838ee - Add DUCC FFT support 6f1a14341 - Ensure info() implementation across all SolverBase derived types f3e7d64f3 - Fix: Correct Lapacke bindings for BDCSVD and JacobiSVD to match the updated API 434a2fc4a - Fix obsolete comment in InverseImpl.h. We use PartialPivLU for the general case. PiperOrigin-RevId: 759257247 Change-Id: I31deb8d802b88861782b34a089eecbdf71abfd47