Disable run-test `art-run-test-2040-huge-native-alloc`.

This test is currently failing when run with the `ArtRunTest` TradeFed
test runner.

Output of `art/test/utils/regen-test-files`:

  Generated Blueprint files for 626 ART run-tests out of 930 (67%).
  Generated TEST_MAPPING entries for 376 ART run-tests out of 930 (40%):
    376 tests (100%) in `mainline-presubmit` test group.
    376 tests (100%) in `presubmit` test group.
    0 tests (0%) in `postsubmit` test group.

(No change to generated ART test files.)

Test: atest --test-mapping art:presubmit
Change-Id: I2facdab526a263ddefa4b316c31c89ea2a019f55
diff --git a/test/utils/regen-test-files b/test/utils/regen-test-files
index f990255..c0e1daf 100755
--- a/test/utils/regen-test-files
+++ b/test/utils/regen-test-files
@@ -207,6 +207,12 @@
   "2005-pause-all-redefine-multithreaded",
   "2008-redefine-then-old-reflect-field",
   "2011-stack-walk-concurrent-instrument",
+  # 2040-huge-native-alloc: Fails with:
+  #
+  #   Test command execution failed with status FAILED: CommandResult: exit code=1, out=, err=Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
+  #           at Main.main(Main.java:56)
+  #
+  "2040-huge-native-alloc",
   "203-multi-checkpoint",
   "2031-zygote-compiled-frame-deopt",
   "2033-shutdown-mechanics",