[Android] Permit ftruncate under Seccomp-BPF.

content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc

Index: content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc
diff --git a/content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc b/content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc
index dd7d1c58c6d8174c455dfcded219de3954fe97ae..f517ae2fd1c21cf47a44214405c8f461452f0e91 100644
--- a/content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc
+++ b/content/common/sandbox_linux/android/sandbox_bpf_base_policy_android.cc
@@ -62,6 +62,10 @@ ResultExpr SandboxBPFBasePolicyAndroid::EvaluateSyscall(int sysno) const {
     case __NR_clone:
     case __NR_epoll_pwait:
     case __NR_flock:
+    case __NR_ftruncate:
+#if defined(__i386__) || defined(__arm__) || defined(__mips__)
+    case __NR_ftruncate64:
+#endif
 #if defined(__x86_64__) || defined(__aarch64__)
     case __NR_newfstatat:
     case __NR_getdents64: