Add angle_deqp_khr_gles32_tests to gn_isolate_map.py Bug: angleproject:3647 Change-Id: I8af7d21ae7b25586b9e3bb77bb64f033fc6cafce Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2548861 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>