Add the CUB submodule.

brycelelbach · brycelelbach · commit 58e858a83e6a · 2019-10-17T12:29:37.000-07:00
diff --git a/.dependencies/cub b/.dependencies/cub
@@ -0,0 +1 @@
+Subproject commit 2b5c0cde428f58d75915466c5b6704b6ebbb5b64
diff --git a/.gitmodules b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "cub"]
+	path = .dependencies/cub
+	url = ../cub.git
