Add hello-opencl to BUILD_PRODUCTS_ISOLATE_WHITELIST

Split from https://skia-review.googlesource.com/c/skia/+/136594 for
easier review.

hello-opencl was added in
https://skia-review.googlesource.com/c/skia/+/136223

Bug: skia:8081
Change-Id: I6535be8b51e95f0f481d48648c5327dc92a02d3b
Reviewed-on: https://skia-review.googlesource.com/138266
Auto-Submit: Ben Wagner <benjaminwagner@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
39 files changed