Disable test on arm due to timeouts.

bug:27824283
Change-Id: I0e4d9b37dd3ac2d2390456a791ff28d9ea0b3510
diff --git a/oatdump/oatdump_test.cc b/oatdump/oatdump_test.cc
index b34bc84..3e420ad 100644
--- a/oatdump/oatdump_test.cc
+++ b/oatdump/oatdump_test.cc
@@ -84,6 +84,8 @@
   std::string core_oat_location_;
 };
 
+// Disable tests on arm as they are taking too long to run for hammerhead. b/27824283.
+#ifndef __arm__
 TEST_F(OatDumpTest, TestImage) {
   std::string error_msg;
   ASSERT_TRUE(Exec(kModeArt, {}, &error_msg)) << error_msg;
@@ -128,5 +130,5 @@
   std::string error_msg;
   ASSERT_TRUE(Exec(kModeSymbolize, {}, &error_msg)) << error_msg;
 }
-
+#endif
 }  // namespace art