iconv: test: Simplify test setup
iconv: test: Simplify test setup

thestinger/vte-ng,jessevdk/vte,flaxandteal/gasket-vte,jessevdk/vte,rvu95/vte,saitoha/vte-sixel,jessevdk/vte,rvu95/vte,thestinger/vte-ng,jessevdk/vte,flaxandteal/gasket-vte,saitoha/vte-sixel,rvu95/vte,flaxandteal/gasket-vte,thestinger/vte-ng,rvu95/vte,saitoha/vte-sixel,flaxandteal/gasket-vte