egl: wayland: Fix overzealous dashing

Dashes are sometimes called minus signs so adding dashes to TRACE_COUNTER
calls would make the counted values negative. Whoops.

Signed-off-by: Kalle Vahlman <kalle.vahlman@movial.com>
Merge pull request #157 from kvahlman/large-rock-dash

egl: wayland: Fix overzealous dashing