Compile script update for Ubuntu

[prosper00]

[prosper00]

I got this to build in Ubuntu 19.04 (amd64) with the following updates to the 'vars_x86linux' file (and linked it to 'vars'):

1. Removed 'march=i686' from CCOPTS
2. Added '-ldl' to EXTRA_LIBS

`TARGET = gsportx OBJECTS = $(OBJECTS1) $(TFEOBJ) $(ATOBJ) $(PCAPOBJ) xdriver.o CC = gcc CCOPTS = -O2 -Wall -fomit-frame-pointer -std=gnu99 -DHAVE_TFE -DHAVE_ATBRIDGE -DTOGGLE_STATUS OPTS = -DGSPORT_LITTLE_ENDIAN SUFFIX = NAME = gsportx LDFLAGS = LDOPTS = LD = g++ EXTRA_LIBS = -ldl -lXext EXTRA_SPECIALS =

AS = cc PERL = perl

XOPTS = -I/usr/X11R6/include `