Add domain-specific language for BPF policies

sandbox/linux/BUILD.gn

Index: sandbox/linux/BUILD.gn
diff --git a/sandbox/linux/BUILD.gn b/sandbox/linux/BUILD.gn
index faf25cd04c7bf6c059f25f3b710a43eb6233f7bd..9f481d6047969e3335cb1af5712b828cc3d2d132 100644
--- a/sandbox/linux/BUILD.gn
+++ b/sandbox/linux/BUILD.gn
@@ -92,6 +92,8 @@ test("sandbox_linux_unittests") {
   }
   if (use_seccomp_bpf) {
     sources += [
+      "bpf_dsl/bpf_dsl_unittest.cc",
+      "bpf_dsl/cons_unittest.cc",
       "seccomp-bpf-helpers/baseline_policy_unittest.cc",
       "seccomp-bpf/bpf_tests_unittest.cc",
       "seccomp-bpf/codegen_unittest.cc",
@@ -129,6 +131,9 @@ test("sandbox_linux_unittests") {
 
 component("seccomp_bpf") {
   sources = [
+    "bpf_dsl/bpf_dsl.cc",
+    "bpf_dsl/bpf_dsl.h",
+    "bpf_dsl/cons.h",
     "seccomp-bpf/basicblock.cc",
     "seccomp-bpf/basicblock.h",
     "seccomp-bpf/codegen.cc",