Fix brotli GN rules
Fix brotli GN rules

Follow-up to https://skia-review.googlesource.com/c/skia/+/595317

Change-Id: I703ad47127d375b2ad0a212c2ebe3c2890b896f4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/595761
Commit-Queue: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia