Use global flags for gobject-introspection

Fixes #672

Author: certik

pkgs/gobject-introspection.yaml

@@ -11,6 +11,10 @@ sources:
 - key: tar.xz:zdqaqmojot5flm77djgcvdgtw7b67tfv
   url: http://ftp.gnome.org/pub/GNOME/sources/gobject-introspection/1.43/gobject-introspection-1.43.3.tar.xz
 
+build_stages:
+- name: configure
+  global_flags: true
+
 when_build_dependency:
 - prepend_path: PKG_CONFIG_PATH
   value: '${ARTIFACT}/lib/pkgconfig'