Vulkan: Bugfix in WarmUpComputeTask 1. An early return caused compute warm up tasks to not be scheduled 2. There are usecases where a program is marked separable post-link. Perform waitForPostLinkTasksImpl unconditionally during save(...) Bug: angleproject:8297 Tests: ProgramBinaryES31Test.SeparableProgramLinkedUniforms* Change-Id: I499f397b938677b4fcdb486001e0a75e202aaf5d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5439732 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>