Log Message:
netsurf: Update www/netsurf to 3.7

pkgsrc changes:
- Remove patches/patch-libsvgtiny_src_svgtiny__internal.h, fixed differently by
  upstream
- Remove patches/patch-nsgenbind* all of them were from upstream and no more
  needed

Changes:
3.7
---
NetSurf 3.7 features performance improvements, improved page layout, and many
fixes. Also new is a treeview search feature, which allows Hotlist (Bookmarks),
History and Cookies to be searched.