build: Try to fix the --without-pcre2 build
build: Try to fix the --without-pcre2 build

https://bugzilla.gnome.org/show_bug.cgi?id=758306

thestinger/vte-ng,saitoha/vte-sixel,saitoha/vte-sixel,saitoha/vte-sixel,thestinger/vte-ng,thestinger/vte-ng