Add seccomp blacklist, and exclude swap functions

Bug: 37253880
Test: Make sure device boots
      Run pylint on genseccomp.py, test_genseccomp.py
      Run test_genseccomp.py
      Run new CTS test
      cts-tradefed run cts -m CtsSecurityTestCases -t android.security.cts.SeccompTest

Change-Id: I833a5364a1481d65173e77654da1798dc45a3f9d
diff --git a/libc/SECCOMP_WHITELIST.TXT b/libc/SECCOMP_WHITELIST.TXT
index ab6ce0b..7dadd39 100644
--- a/libc/SECCOMP_WHITELIST.TXT
+++ b/libc/SECCOMP_WHITELIST.TXT
@@ -1,4 +1,5 @@
-# This file is used to populate seccomp's whitelist policy in comination with SYSCALLS.txt.
+# This file is used to populate seccomp's whitelist policy in combination with SYSCALLS.TXT.
+# Note that the resultant policy is applied only to zygote spawned processes.
 #
 # Each non-blank, non-comment line has the following format:
 #