[gnome-builder] add rls required env (#67)

[Christian Hergert <chergert src gnome org>]

commit 7ce17870fd2326c55f5b9c796a8673e89103fe74
Author: Zhang Cheng <Pigex Zhang gmail com>
Date:   Tue Nov 15 14:29:03 2016 +0800

    add rls required env (#67)
    
    * add rls required env

 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 e84cd12..6c1d088 100644
--- a/plugins/rust-langserv/rust_langserv_plugin.py
+++ b/plugins/rust-langserv/rust_langserv_plugin.py
@@ -78,6 +78,7 @@ class RustService(Ide.Object, Ide.Service):
             launcher = self._create_launcher()
             launcher.set_clear_env(False)
             launcher.setenv("SYS_ROOT", self._discover_sysroot(), True)
+            launcher.setenv("LD_LIBRARY_PATH", os.path.join(self._discover_sysroot(), "lib"), True)
 
             # If rls was installed with Cargo, try to discover that
             # to save the user having to update PATH.