[Sheriff] Mark nacl files as non-deterministic on Linux

Sample run:
https://ci.chromium.org/p/chromium/builders/ci/Deterministic%20Linux/26874

No-Try: true
Bug: 1040247
Change-Id: Idf8f06a1899c8ef66b9b2355f6d9aad57577efa6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2062986Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Sergey Poromov <poromov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742695}

tools/determinism/deterministic_build_whitelist.pyl

@@ -27,6 +27,10 @@
     'nacl_test_data/glibc/pm_exit_status_test_libs/lib64/libppapi_cpp_lib.so',
     'nacl_test_data/glibc/simple_libs/lib64/libppapi_cpp_lib.so',
     'nacl_test_data/glibc/sysconf_nprocessors_onln_test_libs/lib64/libppapi_cpp_lib.so',
+
+    # https://crbug.com/1040247
+    'nacl_irt_x86_64.nexe',
+    'nacl_irt_x86_64.nexe.debug',
   ],
 
   'linux_component': [