content: bpf: exclude the syscalls if arm64

__NR_unlink is not defined on arm64.

BUG=None
R= mdempsky

Review URL: https://codereview.chromium.org/1424513005

Cr-Commit-Position: refs/heads/master@{#358579}
diff --git a/AUTHORS b/AUTHORS
index 7f0279c..498f6aec 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -632,6 +632,7 @@
 Zhuoyu Qian <[email protected]>
 Ziran Sun <[email protected]>
 Zoltan Herczeg <[email protected]>
+Zoltan Kuscsik <[email protected]>
 Zsolt Borbely <[email protected]>
 Yongha Lee <[email protected]>
 方觉 (Fang Jue) <[email protected]>
diff --git a/content/common/sandbox_linux/bpf_gpu_policy_linux.cc b/content/common/sandbox_linux/bpf_gpu_policy_linux.cc
index 8f7fd64d..e8c31279 100644
--- a/content/common/sandbox_linux/bpf_gpu_policy_linux.cc
+++ b/content/common/sandbox_linux/bpf_gpu_policy_linux.cc
@@ -191,7 +191,7 @@
 #endif  // !defined(__aarch64__)
     case __NR_faccessat:
     case __NR_openat:
-#if !defined(OS_CHROMEOS)
+#if !defined(OS_CHROMEOS) && !defined(__aarch64__)
     // The broker process needs to able to unlink the temporary
     // files that it may create. This is used by DRI3.
     case __NR_unlink: