Fix sdbus++-gen-meson version warning

WARNING: Generated meson files from wrong version of
sdbus++-gen-meson.
WARNING: Expected "sdbus++-gen-meson version 1",
got: sdbus++-gen-meson version 3

Add the regenerate-meson file to automatically update meson.build.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: If1ce533bc0f6bafbe75d05595f9d36f5f652bd45
diff --git a/meson.build b/meson.build
index 46b90af..7ec6d03 100644
--- a/meson.build
+++ b/meson.build
@@ -6,7 +6,7 @@
         'warning_level=3',
         'werror=true',
         'cpp_std=c++20',
-        'buildtype=debugoptimized'
+        'buildtype=debugoptimized',
     ]
 )