Increase the timeout for the Win10 FYI Debug (NVIDIA) bot.

TBR=iannucci@chromium.org
NOTRY=true

BUG=820190

Change-Id: I926d479b6c2051ba93842174d1dc468524f0e158
Reviewed-on: https://chromium-review.googlesource.com/964784Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543469}

infra/config/global/cr-buildbucket.cfg

@@ -714,6 +714,7 @@ buckets {
     builders {
       name: "Win10 FYI Debug (NVIDIA)"
       mixins: "win-gpu-fyi-ci"
+      mixins: "gpu-slow-bot"
     }
     builders {
       name: "Win10 FYI dEQP Release (NVIDIA)"