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/logging/matrix_logging.h b/aos/logging/matrix_logging.h
index 630e85e..ef51d56 100644
--- a/aos/logging/matrix_logging.h
+++ b/aos/logging/matrix_logging.h
@@ -15,7 +15,7 @@
 
 // Logs the contents of a matrix and a constant string.
 // matrix must be an instance of an Eigen matrix (or something similar).
-#define LOG_MATRIX(level, message, matrix)                          \
+#define AOS_LOG_MATRIX(level, message, matrix)                      \
   do {                                                              \
     static const ::std::string kAosLoggingMessage(                  \
         LOG_SOURCENAME ": " STRINGIFY(__LINE__) ": " message);      \