Add scss lib to BUILD

Author: kseamon

src/material-experimental/popover-edit/BUILD.bazel

@@ -13,6 +13,14 @@ ng_module(
   ],
 )
 
+sass_library(
+  name = "popover_edit_scss_lib",
+  srcs = glob(["**/_*.scss"]),
+  deps = [
+    "//src/lib/core:core_scss_lib",
+  ],
+)
+
 ng_test_library(
   name = "popover_edit_test_sources",
   srcs = glob(["**/*.spec.ts"]),