Not all filesystems support setting SELinux labels.

Bug: http://b/23530370
Change-Id: Ie4deb3544304754696f049d17b12168cad4a51fd
diff --git a/adb/file_sync_service.cpp b/adb/file_sync_service.cpp
index 6ca8ba1..3793b8e 100644
--- a/adb/file_sync_service.cpp
+++ b/adb/file_sync_service.cpp
@@ -71,6 +71,7 @@
             if (chown(partial_path.c_str(), uid, gid) == -1) {
                 return false;
             }
+            // Not all filesystems support setting SELinux labels. http://b/23530370.
             selinux_android_restorecon(partial_path.c_str(), 0);
         }
     }
@@ -166,10 +167,8 @@
             goto fail;
         }
 
-        if (selinux_android_restorecon(path, 0) == -1) {
-            SendSyncFailErrno(s, "selinux_android_restorecon failed");
-            goto fail;
-        }
+        // Not all filesystems support setting SELinux labels. http://b/23530370.
+        selinux_android_restorecon(path, 0);
 
         // fchown clears the setuid bit - restore it if present.
         // Ignore the result of calling fchmod. It's not supported