test on Skylake Xeons on Linux to cover AVX-512

Seems to be working, so let's keep it that way.

Change-Id: I3bf03962f974d9b3833c0765531ce3e6960a871f
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/197830
Auto-Submit: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/infra/bots/gen_tasks.go b/infra/bots/gen_tasks.go
index 69d6a90..3470d0a 100644
--- a/infra/bots/gen_tasks.go
+++ b/infra/bots/gen_tasks.go
@@ -18,8 +18,8 @@
 
 func addTask(b *specs.TasksCfgBuilder, task string) {
 	dimensions := map[string][]string{
-		// For the moment we'd rather not run bots on Skylakes, which support AVX-512.
-		"skcms-Linux": []string{"os:Linux", "cpu:x86-64-Haswell_GCE"},
+		// It's nice to test on Skylake Xeons, which support AVX-512.
+		"skcms-Linux": []string{"os:Linux", "cpu:x86-64-Skylake_GCE"},
 		"skcms-Mac":   []string{"os:Mac"},
 		// We think there's something amiss building on Win7 or Win8 bots, so restrict to 2016.
 		"skcms-Win": []string{"os:Windows-2016Server"},
diff --git a/infra/bots/tasks.json b/infra/bots/tasks.json
index ca0f4db..a128a5d 100644
--- a/infra/bots/tasks.json
+++ b/infra/bots/tasks.json
@@ -57,7 +57,7 @@
       ],
       "dimensions": [
         "os:Linux",
-        "cpu:x86-64-Haswell_GCE",
+        "cpu:x86-64-Skylake_GCE",
         "gpu:none",
         "pool:Skia"
       ],