[gtk/wip/baedert/test-cflags] build: Add -Wno-typedef-redefinition to build

[Timm Bäder <baedert src gnome org>]

commit 73d8f6a090afd8a9ea4ebffd5e1376a71f16e503
Author: Timm Bäder <mail baedert org>
Date:   Thu Mar 12 08:32:34 2020 +0100

    build: Add -Wno-typedef-redefinition to build
    
    Clang otherwise complains about this

 meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/meson.build b/meson.build
index 6fd7d68b45..a16b1074dc 100644
--- a/meson.build
+++ b/meson.build
@@ -237,6 +237,7 @@ if cc.get_id() == 'msvc'
 elif cc.get_id() == 'gcc' or cc.get_id() == 'clang'
   test_cflags = [
     '-fno-strict-aliasing',
+    '-Wno-typedef-redefinition',
     '-Wcast-align',
     '-Wduplicated-branches',
     '-Wduplicated-cond',