[gnome-builder/wip/chergert/langserv] rust-langserv: don't clear process environment

[Christian Hergert <chergert src gnome org>]

commit f41ee81cf9c87f784635a11eb99eb8dc54557611
Author: Christian Hergert <chergert redhat com>
Date:   Mon Oct 24 02:32:09 2016 -0700

    rust-langserv: don't clear process environment
    
    Turns out rls needs the parent environment for whatever reasons.

 plugins/rust-langserv/rust_langserv_plugin.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/rust-langserv/rust_langserv_plugin.py b/plugins/rust-langserv/rust_langserv_plugin.py
index b571398..0872e51 100644
--- a/plugins/rust-langserv/rust_langserv_plugin.py
+++ b/plugins/rust-langserv/rust_langserv_plugin.py
@@ -57,6 +57,7 @@ class RustService(Ide.Object, Ide.Service):
         """
         # Setup a launcher to spawn the rust language server
         launcher = self._create_launcher()
+        launcher.set_clear_env(False)
         launcher.setenv("SYS_ROOT", self._discover_sysroot(), True)
 
         # If rls was installed with Cargo, try to discover that