dev-perl/Pango: Disable running X11 tests w/ USE=minimal bug #662320

dev-perl/Pango: Disable running X11 tests w/ USE=minimal bug #662320

When USE="minimal", various deps are omitted to break cycles. Among
these are Xvfb, which means virtx can't be imagined to work.

This change avoids running live X11 tests with Xvfb in this condition.

To avoid this resulting in a total degradation of testing-safety, a
rudimentary "it compiles!" test has been inserted that ensures Pango.pm
actually loads at all.

Bug: https://bugs.gentoo.org/662320

20

Package-Manager: Portage-2.3.66, Repoman-2.3.16
Signed-off-by: Kent Fredric <kentnl@gentoo.org>