Move NPM version definitions into separate .bzl file in /lib

Move the definitions of NPM_VERSIONS and NPM_SHA1S into a separate .bzl
file in the /lib folder so that upgrades to the NPM components (bower,
crisper, vulcanize) require the Library-Compliance label to be set.

Change-Id: I691bb4fbdeeba2f1b05753310a8673febbfb6786

lib/js/npm.bzl

diff --git a/lib/js/npm.bzl b/lib/js/npm.bzl
new file mode 100644
index 0000000..0fd575d
--- /dev/null
+++ b/lib/js/npm.bzl
@@ -0,0 +1,11 @@
+NPM_VERSIONS = {
+    "bower": "1.8.2",
+    "crisper": "2.0.2",
+    "vulcanize": "1.14.8",
+}
+
+NPM_SHA1S = {
+    "bower": "adf53529c8d4af02ef24fb8d5341c1419d33e2f7",
+    "crisper": "7183c58cea33632fb036c91cefd1b43e390d22a2",
+    "vulcanize": "679107f251c19ab7539529b1e3fdd40829e6fc63",
+}