atrace:  Adding dumping message to logcat.

Change-Id: Ida9e7ce8a05f8c5e44245ad0c383453d2ea7d79f
diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 87f637c..23954ea 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -42,6 +42,8 @@
 
 using namespace android;
 
+#define LOG_TAG "atrace"
+
 #define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
 
 enum { MAX_SYS_FILES = 10 };
@@ -769,6 +771,7 @@
 // Read the current kernel trace and write it to stdout.
 static void dumpTrace()
 {
+    ALOGE("Dumping trace");
     int traceFD = open(k_tracePath, O_RDWR);
     if (traceFD == -1) {
         fprintf(stderr, "error opening %s: %s (%d)\n", k_tracePath,