fix(cross): bake hwdata into the toolchain image for libdisplay-info

libdisplay-info 0.2.0's meson build reads /usr/share/hwdata/pnp.ids on the build
machine to bake the PNP-ID table into the library; without it `meson setup`
fails ("File /usr/share/hwdata/pnp.ids does not exist"). Add hwdata to the image
toolset alongside build-essential. Toolset change re-keys the image tag, so
publish rebuilds it automatically.

Signed-off-by: Joel Winarske <joel.winarske@gmail.com>

.github/cspell.json

@@ -46,6 +46,7 @@
     "libxkbcommon",
     "dlopens",
     "gstreamer",
+    "hwdata",
     "pipewire",
     "sdbus",
     "waypp",

lib/src/cross/dockerfile_emitter.dart

@@ -50,10 +50,11 @@ FROM $fromImage
 # Build tooling: cmake/ninja/meson/pkg-config + the embedder's host codegen
 # (wayland-scanner via libwayland-bin; git/curl for the engine-header fetch).
 # build-essential gives meson a native (build-machine) compiler — required to
-# configure even a cross build when rebuilding `augment` libs (libdisplay-info).
+# configure even a cross build when rebuilding `augment` libs (libdisplay-info,
+# which also reads hwdata's /usr/share/hwdata/pnp.ids at build time).
 RUN apt-get update \\
  && apt-get install -y --no-install-recommends \\
-      cmake ninja-build meson build-essential pkg-config \\
+      cmake ninja-build meson build-essential pkg-config hwdata \\
       tar xz-utils rsync ca-certificates libwayland-bin git curl \\
  && rm -rf /var/lib/apt/lists/*
 ENV FLUTTER_WORKSPACE=$workspace

test/src/cross/dockerfile_emitter_test.dart

@@ -23,6 +23,7 @@ void main() {
       expect(df, contains('ninja-build'));
       expect(df, contains('meson')); // builds augment libs (libdisplay-info)
       expect(df, contains('build-essential')); // native cc for meson configure
+      expect(df, contains('hwdata')); // libdisplay-info build reads pnp.ids
       expect(df, contains('libwayland-bin')); // wayland-scanner for wayland-egl
       expect(df, contains('FROM ${ToolchainImage.defaultFrom}'));
       expect(df, contains('emb.triple="aarch64-none-linux-gnu"'));