Add gles_ext_params Capture functions for MemoryObjectsEXT.
Add case for GLCreateMemoryObjectsEXT to MaybeCaptureUpdateResourceIDs.
Don't skip MemoryObjectTest, as it passes now on SwiftShader ES2.

Bug: angleproject:5703
Change-Id: I930fab675cf0848f46a846388955a6bd3274a587
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2729004
Commit-Queue: Lubosz Sarnecki <lubosz.sarnecki@collabora.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>