add lld to host packages.

This adds lld to host packages.

BUG=chromium:701659
TEST=cbuildbot chromiumos-sdk

Change-Id: I02c4837eaae0128f32af513f0afbb3ae1cf08c81
Reviewed-on: https://chromium-review.googlesource.com/747280
Commit-Ready: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
diff --git a/scripts/cros_setup_toolchains.py b/scripts/cros_setup_toolchains.py
index ec87aca..2b7976a 100644
--- a/scripts/cros_setup_toolchains.py
+++ b/scripts/cros_setup_toolchains.py
@@ -54,6 +54,7 @@
     'sys-devel/binutils',
     'sys-devel/clang',
     'sys-devel/gcc',
+    'sys-devel/lld',
     'sys-devel/llvm',
     'sys-kernel/linux-headers',
     'sys-libs/glibc',
@@ -73,6 +74,7 @@
 # so we have to list them here and wait.  Once it completes, entries here can
 # be removed so they'll end up on bots & dev's systems.
 NEW_PACKAGES = (
+    'sys-devel/lld',
 )
 
 # Enable the Go compiler for these targets.