tap/awk: support colorized output * lib/tap-driver.sh: Pass definition of colors to the BEGIN block of the awk script, using ... ($init_colors): ... this new variable, which supersedes ... ($red, $grn, $lgn, $blu, $mgn, $std): ... these variables, which have been consequently removed. ($color_tests): We don't have to pass this anymore to the awk script, so do not convert it to a numeric boolean. (decorate_result): Implement for real. With this change, the test 'tap-color.test' now passes.