build: Bump libcc to latest (2.0.x) (electron#13825)

poiru · MarshallOfSound · commit cf4861b5756e · 2018-07-27T23:05:49.000+10:00
This picks up electron/libchromiumcontent#619.
diff --git a/vendor/libchromiumcontent b/vendor/libchromiumcontent
@@ -1 +1 @@
-Subproject commit 0f50f5e3b3fff53d53f72eb39293e01083480311
+Subproject commit 1df280f9780606d262625e328b91c487b9214e22
