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/pest_generator/meson.build

@@ -0,0 +1,30 @@
+project(
+  'pest_generator',
+  'rust',
+  version : '2.7.11',
+  license :'MIT OR Apache-2.0',
+)
+
+pest = subproject('pest').get_variable('lib')
+pest_meta = subproject('pest_meta').get_variable('lib')
+quote = subproject('quote').get_variable('lib')
+pm2 = subproject('proc-macro2').get_variable('lib')
+syn = subproject('syn').get_variable('lib')
+
+rust_args = [
+  '--cfg', 'feature="std"',
+]
+
+lib = static_library(
+  'pest_generator',
+  'src/lib.rs',
+  rust_args : rust_args,
+  override_options : ['rust_std=2021', 'build.rust_std=2021'],
+  link_with : [pest, pest_meta, pm2, quote, syn],
+  rust_abi : 'rust',
+  native : true,
+)
+
+dep_pest_generator = declare_dependency(
+  link_with : [lib, pest, pest_meta, quote, syn],
+)