[gnome-builder/wip/gtk4-port: 1525/1774] build: allow strict-prototypes as a warning

[Christian Hergert <chergert src gnome org>]

commit 8fe050e291d2a103e9e2bb145794a00eb43020a7
Author: Christian Hergert <christian hergert me>
Date:   Wed Jun 15 15:06:03 2022 -0700

    build: allow strict-prototypes as a warning
    
    Since we are likely to hit this with some compilers (clang) on some systems
    (macOS) with some packaging systems (brew).

 meson.build | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index e7091838b..bf39e2e4a 100644
--- a/meson.build
+++ b/meson.build
@@ -172,7 +172,6 @@ test_c_args = [
   '-Werror=return-type',
   '-Werror=sequence-point',
   '-Werror=shadow',
-  '-Werror=strict-prototypes',
   '-Werror=trigraphs',
   '-Werror=undef',
   '-Werror=write-strings',