Was accidentally specified as "linux-win-rel".

Bug: angleproject:5530
Change-Id: Ica5ac1dd685704835049d8f222196f3eb5f7e8c4
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2626514Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>