Update from https://crrev.com/327068

sandbox/linux/BUILD.gn

Index: sandbox/linux/BUILD.gn
diff --git a/sandbox/linux/BUILD.gn b/sandbox/linux/BUILD.gn
index 211c22bd3dd7bf4c9ba7c5d0df8f0e3daf9ceb4b..84966854cec7762df3530489d16dfacb818f14ed 100644
--- a/sandbox/linux/BUILD.gn
+++ b/sandbox/linux/BUILD.gn
@@ -117,6 +117,7 @@ source_set("sandbox_linux_unittests_sources") {
       "seccomp-bpf/errorcode_unittest.cc",
       "seccomp-bpf/sandbox_bpf_unittest.cc",
       "seccomp-bpf/syscall_unittest.cc",
+      "seccomp-bpf/trap_unittest.cc",
     ]
   }
   if (compile_credentials) {
@@ -147,7 +148,7 @@ shared_library("sandbox_linux_jni_unittests") {
     ":sandbox_linux_unittests_sources",
   ]
   if (is_android) {
-    deps += [ "//testing/android:native_test_native_code" ]
+    deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }
 
@@ -288,15 +289,16 @@ component("sandbox_services") {
 
 source_set("sandbox_services_headers") {
   sources = [
-    "system_headers/android_arm64_ucontext.h",
-    "system_headers/android_arm_ucontext.h",
-    "system_headers/android_futex.h",
-    "system_headers/android_i386_ucontext.h",
-    "system_headers/android_ucontext.h",
     "system_headers/arm64_linux_syscalls.h",
+    "system_headers/arm64_linux_ucontext.h",
     "system_headers/arm_linux_syscalls.h",
+    "system_headers/arm_linux_ucontext.h",
+    "system_headers/i386_linux_ucontext.h",
+    "system_headers/linux_futex.h",
     "system_headers/linux_seccomp.h",
+    "system_headers/linux_signal.h",
     "system_headers/linux_syscalls.h",
+    "system_headers/linux_ucontext.h",
     "system_headers/x86_32_linux_syscalls.h",
     "system_headers/x86_64_linux_syscalls.h",
   ]