meson: Replace configure_file with fs.copyfile

configure_file is deprecated since 0.64.0, and replace it with
fs.copyfile.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: Ifcd5c0ece7c8738628ae90101c194a9dc8938277
diff --git a/services/meson.build b/services/meson.build
index a35e9e9..e94eeed 100644
--- a/services/meson.build
+++ b/services/meson.build
@@ -3,9 +3,11 @@
     'psu-update@.service'
 ]
 
+fs = import('fs')
 foreach unit : unit_files
-configure_file(input: unit,
-               output: unit,
-               copy: true,
-               install_dir: servicedir)
+    fs.copyfile(
+        unit,
+        install: true,
+        install_dir: servicedir
+    )
 endforeach