comms/gnokii: Cleanup and modernize port

• Remove pkg-install, all it was doing is now done from pkg-plist [1]
• Fix sendsms script to work with sh
• Use shebangfix in place of REINPLACE_CMD
• Remove unneeded REINPLACE_CMDs
• Remove bogus SMSDDB option, and use OPTIONS_GROUP in place of OPTIONS_MULTI
• Remove duplicate "gnome" from X11_USES (already in global USES)
• Add missing dependency on harfbuzz when X11 is enabled
• Remove unneeded "-p" from ${MKDIR}
• Delete an old, unused, patch file

Reported by: bapt [1]