Work on getting things built with -Wimplicit-fallthrough. This CL was uploaded by git cl split.

Bug: 177475
R=rsesek@chromium.org

Change-Id: I3c346f2eabb11468a66b331213dacdcde19d0b4a
Reviewed-on: https://chromium-review.googlesource.com/889762Reviewed-by: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532114}

services/service_manager/sandbox/linux/bpf_broker_policy_linux.cc

@@ -117,6 +117,7 @@ ResultExpr BrokerProcessPolicy::EvaluateSyscall(int sysno) const {
           allowed_command_set_.test(sandbox::syscall_broker::COMMAND_UNLINK)) {
         return Allow();
       }
+      break;
 #endif
 #if defined(__NR_unlinkat)
     case __NR_unlinkat:
@@ -125,6 +126,7 @@ ResultExpr BrokerProcessPolicy::EvaluateSyscall(int sysno) const {
           allowed_command_set_.test(sandbox::syscall_broker::COMMAND_UNLINK)) {
         return Allow();
       }
+      break;
 #endif
     default:
       break;