Add lazy_static dep to cxx-build
diff --git a/BUCK b/BUCK
index 0505bd2..22db155 100644
--- a/BUCK
+++ b/BUCK
@@ -53,6 +53,7 @@
     deps = [
         "//third-party:cc",
         "//third-party:codespan-reporting",
+        "//third-party:lazy_static",
         "//third-party:proc-macro2",
         "//third-party:quote",
         "//third-party:syn",