security/nss: update to 3.78
Changes: https://groups.google.com/a/mozilla.org/g/dev-tech-crypto/c/hQUjX_jwbEk
Changes: https://hg.mozilla.org/projects/nss/shortlog/NSS_3_78_RTM
Reported by: Repology
(cherry picked from commit 310fcbe774fc5353b19c27b60c3ab76024dbb2bd)