security/libgcrypt: update to 1.8.0

• Update libgcrypt to 1.8.0
• Update libgpg-error version required to 1.25
• Bump library version in pkg-plist

Changes: https://lists.gnupg.org/pipermail/gnupg-announce/2017q3/000410.html
Binary compatibility report: https://abi-laboratory.pro/tracker/compat_report/libgcrypt/1.7.8/1.8.0/d9ddd/abi_compat_report.html

PR: 220858
MFH: 2017Q3
Exp-run by: antoine