Disable Dex2oatWatchdogTest.TestWatchdogTrigger.

This test has been prone to timeouts lately; disable it while we
investigate.

Test: n/a
Bug: 121352534
Change-Id: I2f8dfd1359f486206cc596b02026c3151863baef
diff --git a/dex2oat/dex2oat_test.cc b/dex2oat/dex2oat_test.cc
index fd454f0..524bce0 100644
--- a/dex2oat/dex2oat_test.cc
+++ b/dex2oat/dex2oat_test.cc
@@ -1011,6 +1011,10 @@
 }
 
 TEST_F(Dex2oatWatchdogTest, TestWatchdogTrigger) {
+  // This test is frequently interrupted by timeout_dumper on host (x86);
+  // disable it while we investigate (b/121352534).
+  TEST_DISABLED_FOR_X86();
+
   // The watchdog is independent of dex2oat and will not delete intermediates. It is possible
   // that the compilation succeeds and the file is completely written by the time the watchdog
   // kills dex2oat (but the dex2oat threads must have been scheduled pretty badly).