build: Avoid install:true in configure_file()

This is a meson 0.50 feature which we don't strictly need to rely on.
According to meson docs: "When omitted it defaults to true when
install_dir is set and not empty, false otherwise."

In all places we use it we (obviously) define install_dir, so the
files should be installed without it being specifically told so.

0 files changed, 0 insertions, 0 deletions