Add missing test files to angle_end2end_tests_sources.
Add missing test files to angle_end2end_tests_sources.

Change-Id: I97217f4b4f42d9b9811185706587e2eb55270888
Reviewed-on: https://chromium-review.googlesource.com/239226
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Tested-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>

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