Have BuildStats use Flutter's stripped lib

That's what their treemap says and we should try to match it.

Bug: skia:
Change-Id: Iefa95c0440eb6b45a94a72c1beffb8a1199152a4
Reviewed-on: https://skia-review.googlesource.com/c/161825
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
diff --git a/infra/bots/gen_tasks.go b/infra/bots/gen_tasks.go
index dcb021c..d23283a 100644
--- a/infra/bots/gen_tasks.go
+++ b/infra/bots/gen_tasks.go
@@ -613,6 +613,10 @@
 				// machines (after Aug 2018).
 				return linuxGceDimensions(MACHINE_TYPE_MEDIUM)
 			}
+			if parts["role"] == "BuildStats" {
+				// Doesn't require a lot of resources
+				return linuxGceDimensions(MACHINE_TYPE_MEDIUM)
+			}
 			// Use many-core machines for Build tasks.
 			return linuxGceDimensions(MACHINE_TYPE_LARGE)
 		} else if d["os"] == DEFAULT_OS_WIN {