Get rid of some more perl (Unity support test)

graphics.txt has two jobs that run unity_support_test from nux tools.

They both use perl to do some sustitution and essentially remove the ansi stuff from the output:

bladernr@klaatu:~/development/checkbox/jobs$ grep unity_support *
graphics.txt.in: perl -e '$a=`/usr/lib/nux/unity_support_test -c -p`;$a=~s/\e\[[\d;]*m//g;print $a;exit($? ? 1:0)'
graphics.txt.in: perl -e '$a=`/usr/lib/nux/unity_support_test -p`;$a=~s/\e\[[\d;]*m//g;print $a;exit($? ? 1:0)'

Checkbox, for some time, has had ansi_parser that does this internally.

We should remove the perl bits in favor of using ansi_parser. This removes some of that perl mess ;-) but also puts the tests in line with other tests that use ansi_parser to remove ansi charactres from the output.