Add releaseAndAbandonGpuContext bot

Bug: skia:5142
Change-Id: I35bd42d1a9da2293092a2f09aaaf523a0f36537a
Reviewed-on: https://skia-review.googlesource.com/14376
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/infra/bots/gen_tasks.go b/infra/bots/gen_tasks.go
index d14f881..4a1ac7a 100644
--- a/infra/bots/gen_tasks.go
+++ b/infra/bots/gen_tasks.go
@@ -94,6 +94,9 @@
 			// skia:6267
 			ec = ""
 		}
+		if ec == "ReleaseAndAbandonGpuContext" {
+			ec = ""
+		}
 		if task_os == "Android" {
 			if ec == "Vulkan" {
 				ec = "Android_Vulkan"