[gnome-builder] meson: use Ide.debug() for logging

[Christian Hergert <chergert src gnome org>]

commit a23223a7283149cb430d6c41e6a59c57dfaa3665
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jun 9 01:37:05 2017 -0700

    meson: use Ide.debug() for logging
    
    This is rather annoying to see as output without proper logging API. It
    also can be debug, it's not exactly critical.

 plugins/meson/meson_plugin/__init__.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/meson/meson_plugin/__init__.py b/plugins/meson/meson_plugin/__init__.py
index 1b8f412..73c98ab 100644
--- a/plugins/meson/meson_plugin/__init__.py
+++ b/plugins/meson/meson_plugin/__init__.py
@@ -158,7 +158,7 @@ class MesonBuildSystem(Ide.Object, Ide.BuildSystem, Gio.AsyncInitable):
                         except:
                             pass
 
-            print('Meson: Warning: No flags found')
+            Ide.debug('No flags found for file', infile)
 
             task.return_boolean(True)