Prefix LOG and CHECK with AOS_

This prepares us for introducing glog more widely and transitioning
things over where they make sense.

Change-Id: Ic6c208882407bc2153fe875ffc736d66f5c8ade5
diff --git a/aos/scoped/scoped_fd.cc b/aos/scoped/scoped_fd.cc
index a570df0..74f8882 100644
--- a/aos/scoped/scoped_fd.cc
+++ b/aos/scoped/scoped_fd.cc
@@ -7,7 +7,7 @@
 void ScopedFD::Close() {
   if (fd_ != -1) {
     if (close(fd_) == -1) {
-      PLOG(WARNING, "close(%d) failed", fd_);
+      AOS_PLOG(WARNING, "close(%d) failed", fd_);
     }
   }
 }