meson: Add pest rust dependencies

Including its dependency ucd-trie.

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Reviewed-by: @LingMan
Reviewed-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28869>

subprojects/packagefiles/once_cell/meson.build

@@ -0,0 +1,23 @@
+project(
+  'once_cell',
+  'rust',
+  version : '1.8.0',
+  license :'MIT OR Apache-2.0',
+)
+
+rust_args = [
+  '--cfg', 'feature="std"'
+]
+
+lib = static_library(
+  'once_cell',
+  'src/lib.rs',
+  rust_args : rust_args,
+  override_options : ['rust_std=2018', 'build.rust_std=2018'],
+  rust_abi : 'rust',
+  native : true,
+)
+
+dep_once_cell = declare_dependency(
+  link_with : [lib],
+)