Fix GrTextureStripAtlasManager cleanup order bug

Bug: 820703
Change-Id: I6f1a895ceb213d38361bc03a472cf2a48e4720a5
Reviewed-on: https://skia-review.googlesource.com/115001
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/gn/tests.gni b/gn/tests.gni
index 661179e..f20718e 100644
--- a/gn/tests.gni
+++ b/gn/tests.gni
@@ -261,6 +261,7 @@
   "$_tests/TextBlobCacheTest.cpp",
   "$_tests/TextBlobTest.cpp",
   "$_tests/TextureProxyTest.cpp",
+  "$_tests/TextureStripAtlasManagerTest.cpp",
   "$_tests/Time.cpp",
   "$_tests/TopoSortTest.cpp",
   "$_tests/ToSRGBColorFilter.cpp",