[glibmm] examples, tests: Disable deprecated API when building with Meson

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 6d1b3ed5370b133773b4ffe2d25c61bfbc36d06f
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Mon Mar 9 15:10:03 2020 +0100

    examples, tests: Disable deprecated API when building with Meson
    
    Deprecated GLIBMM and GIOMM API are disabled when example programs and test
    programs are built with Autotools. Do the same when building with Meson.

 examples/meson.build | 1 +
 tests/meson.build    | 1 +
 2 files changed, 2 insertions(+)
---
diff --git a/examples/meson.build b/examples/meson.build
index a6c6c613..18c0d832 100644
--- a/examples/meson.build
+++ b/examples/meson.build
@@ -62,6 +62,7 @@ foreach ex : examples
   endforeach
 
   executable(ex_name, ex_sources,
+    cpp_args: ['-DGLIBMM_DISABLE_DEPRECATED', '-DGIOMM_DISABLE_DEPRECATED'],
     dependencies: ex[3] ? giomm_dep : glibmm_dep,
     gui_app: false,
     build_by_default: build_examples,
diff --git a/tests/meson.build b/tests/meson.build
index 1f4f6bae..14d67e7a 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -53,6 +53,7 @@ foreach ex : test_programs
   endforeach
 
   exe_file = executable(ex_name, ex_sources,
+    cpp_args: ['-DGLIBMM_DISABLE_DEPRECATED', '-DGIOMM_DISABLE_DEPRECATED'],
     dependencies: ex[3] ? giomm_dep : glibmm_dep,
     gui_app: false,
     build_by_default: true,