[gnome-builder] cargo: use --verbose when building

[Christian Hergert <chergert src gnome org>]

commit 24f9990d28e6bba7283f6aeeefbab09f90522631
Author: Christian Hergert <chergert redhat com>
Date:   Wed Mar 29 16:56:58 2017 -0600

    cargo: use --verbose when building
    
    If we get an error, we want to tell the user why with more information.

 plugins/cargo/cargo_plugin.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/cargo/cargo_plugin.py b/plugins/cargo/cargo_plugin.py
index 62bdd23..b11ea27 100644
--- a/plugins/cargo/cargo_plugin.py
+++ b/plugins/cargo/cargo_plugin.py
@@ -111,6 +111,7 @@ class CargoPipelineAddin(Ide.Object, Ide.BuildPipelineAddin):
         build_launcher.setenv('CARGO_TARGET_DIR', builddir, True)
         build_launcher.push_argv(cargo)
         build_launcher.push_argv('build')
+        build_launcher.push_argv('--verbose')
         build_launcher.push_argv('--manifest-path')
         build_launcher.push_argv(cargo_toml)
         build_launcher.push_argv('--message-format')