Support all architectures in seccomp

Test: Make sure arm, x86, x86_64, mips, mips64 emulators boot
      Make sure sailfish still boots
      Ran CTS test from
      https://android-review.googlesource.com/#/c/348671/3 and it passed
      The instructions for how to run mips emulators above worked, but
      the CTS tests did not seem to actually run.

Change-Id: Iddee5acdb19ed32c7bd4657573313ca439cf6a49
diff --git a/libc/seccomp/Android.bp b/libc/seccomp/Android.bp
index 71b710e..c341781 100644
--- a/libc/seccomp/Android.bp
+++ b/libc/seccomp/Android.bp
@@ -4,6 +4,10 @@
         "seccomp_policy.cpp",
         "arm_policy.cpp",
         "arm64_policy.cpp",
+        "x86_policy.cpp",
+        "x86_64_policy.cpp",
+        "mips_policy.cpp",
+        "mips64_policy.cpp",
     ],
     export_include_dirs: ["include"],
     shared: {