Remove lld from NEW_PACKAGES.

The lastest chromiumos-sdk contains lld, so we can remove it from
NEW_PACKAGES. It also adds lld to MANUAL_PKGS, so that lld can be
included in standalone toolchain.

BUG=chromium:775561
TEST=None

Change-Id: I0ed65443161f5f975efcd4707e251c780a57af63
Reviewed-on: https://chromium-review.googlesource.com/753981
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 2b7976a..64b8825 100644
--- a/scripts/cros_setup_toolchains.py
+++ b/scripts/cros_setup_toolchains.py
@@ -74,7 +74,6 @@
 # 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.
@@ -127,6 +126,7 @@
   # crossdev.
   MANUAL_PKGS = {
       'clang': 'sys-devel',
+      'lld': 'sys-devel',
       'llvm': 'sys-devel',
       'libcxxabi': 'sys-libs',
       'libcxx': 'sys-libs',