security/libsecret: Mark as PIE_UNSAFE

ld: error: relocation R_X86_64_64 cannot be used against local symbol;
recompile with -fPIC

PR: 288721
Approved by: gnome@ (maintainer, timeout > 3 weeks)
Approved by: yuri@ (Mentor)

MFH: 2025Q3
(cherry picked from commit 8b2e453449d365065bbd4e897a9509abd5bac99d)