net/tigervnc: update to 1.8.0
- Remove CONFLICST with vnc as net/vnc no longer exists
- Pet portlint, move LIB_DEPENDS up and regenerate patches with make makepatch
Changes: https://github.com/TigerVNC/tigervnc/releases/tag/v1.8.0
PR: 219566
Submitted by: Koichiro IWAO <meta+ports@vmeta.jp> (maintainer)