[gnome-builder] build: fix building with rc suffix

[Christian Hergert <chergert src gnome org>]

commit 4afb4c167ff8d042d8d19ab49f3045e1e404bfca
Author: Christian Hergert <chergert redhat com>
Date:   Mon Mar 7 13:08:26 2022 -0800

    build: fix building with rc suffix

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 5bd606242..592c2af4b 100644
--- a/meson.build
+++ b/meson.build
@@ -64,7 +64,7 @@ status = [
 config_h = configuration_data()
 
 # Message of doom
-if (version_split[1][0] == 'a' or version_split[1][0] == 'b')
+if version_split[1][0] in ['a', 'b', 'r']
   config_h.set10('DEVELOPMENT_BUILD', 1)
   MINOR_VERSION = 0
   status += [