Snippets for libgcrypt 1.12.3 from FreeBSD 150amd64

Sourced from https://pkg-status.freebsd.org/beefy23/data/latest-per-pkg/libgcrypt/1.12.3_2/150amd64-default.log.

• mceliece6688128f.c:769:19: warning: unused function 'vec_testz' [-Wunused-function]
    769 | static inline int vec_testz(vec a)
        |                   ^~~~~~~~~