Create nonzero_clear_resources_on_creation_for_testing toggle

Created toggle to force texture clearing to 1 bits in order to
test the logic of lazy clearing.

Bug: dawn:145
Change-Id: I83bc32f046159c709c426b77458fbdf115f7bfd0
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/7120
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Natasha Lee <natlee@microsoft.com>
diff --git a/BUILD.gn b/BUILD.gn
index 44709b1..36e6301 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -643,6 +643,7 @@
     "src/tests/end2end/IndexFormatTests.cpp",
     "src/tests/end2end/InputStateTests.cpp",
     "src/tests/end2end/MultisampledRenderingTests.cpp",
+    "src/tests/end2end/NonzeroTextureCreationTests.cpp",
     "src/tests/end2end/ObjectCachingTests.cpp",
     "src/tests/end2end/PrimitiveTopologyTests.cpp",
     "src/tests/end2end/PushConstantTests.cpp",