add a in memory trace log with processor timestamps. closes #1042

git-svn-id: file:///svn/tokudb@5321 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/trace_mem.c

@@ -2,7 +2,7 @@
 #include "../include/rdtsc.h"
 
 // customize this as required
-#define NTRACE 1000
+#define NTRACE 0
 #if NTRACE
 static struct toku_trace {
     const char *str;