Add Nexus5x

Bug: skia:7309
NoTry: true
Change-Id: I9d9e18f8fe8bc53a54de26533485b262ba825ea7
Reviewed-on: https://skia-review.googlesource.com/72980
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
diff --git a/infra/bots/gen_tasks.go b/infra/bots/gen_tasks.go
index 037ab27..d370563 100644
--- a/infra/bots/gen_tasks.go
+++ b/infra/bots/gen_tasks.go
@@ -228,6 +228,7 @@
 				"NVIDIA_Shield":   {"foster", "NRD90M"},
 				"Nexus10":         {"manta", "LMY49J"},
 				"Nexus5":          {"hammerhead", "M4B30Z"},
+				"Nexus5x":         {"bullhead", "OPR6.170623.023"},
 				"Nexus6":          {"shamu", "M"},
 				"Nexus6p":         {"angler", "OPR5.170623.007"},
 				"Nexus7":          {"grouper", "LMY47V"},