[sysprof] meson: bump to newer release of meson

[Christian Hergert <chergert src gnome org>]

commit 921e6d48d7e49b8b2a90be8a25055f65240878a1
Author: Christian Hergert <chergert redhat com>
Date:   Mon Oct 8 17:46:18 2018 -0700

    meson: bump to newer release of meson

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 5401238..24e04d0 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project('sysprof', ['c', 'cpp'],
   license: ['GPL3+', 'GPL2+'],
   version: '3.31.0',
-  meson_version: '>=0.40.1',
+  meson_version: '>=0.47.2',
   default_options: [
     'c_std=gnu11',
     'cpp_std=c++03',