[gdk-pixbuf] Fix exit status of gen-resources.py

[Emmanuele Bassi <ebassi src gnome org>]

commit 37ab8e55bdd202fefc03448497b350a2469d6201
Author: Michael Forney <mforney mforney org>
Date:   Thu Jan 9 18:28:22 2020 -0800

    Fix exit status of gen-resources.py
    
    If glib-compile-resources did not produce anything on stdout,
    gen-resources.py reports success, even if it actually failed. This
    can lead to a build error down the line.
    
    Instead, just use os.execvpe after setting up the environment.

 build-aux/gen-resources.py | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)
---
diff --git a/build-aux/gen-resources.py b/build-aux/gen-resources.py
index 4c182d9cf..3f790b6c9 100644
--- a/build-aux/gen-resources.py
+++ b/build-aux/gen-resources.py
@@ -6,8 +6,6 @@
 
 import argparse
 import os
-import subprocess
-import sys
 
 argparser = argparse.ArgumentParser(description='Compile resources')
 argparser.add_argument('--pixdata', metavar='PATH', help='Path to gdk-pixbuf-pixdata')
@@ -36,9 +34,4 @@ newenv = os.environ.copy()
 newenv['GDK_PIXBUF_PIXDATA'] = args.pixdata
 newenv['GDK_PIXBUF_MODULE_FILE'] = args.loaders
 
-out, err = subprocess.Popen(cmd, env=newenv).communicate()
-if out is None:
-    sys.exit(0)
-else:
-    print(out)
-    sys.exit(1)
+os.execvpe(cmd[0], cmd, newenv)