Remove TraceMappedRegion entirely, and use KernelMapping instead.

src/AutoRemoteSyscalls.cc

diff --git a/src/AutoRemoteSyscalls.cc b/src/AutoRemoteSyscalls.cc
index 2085b7b..cb1284b 100644
--- a/src/AutoRemoteSyscalls.cc
+++ b/src/AutoRemoteSyscalls.cc
@@ -4,6 +4,8 @@
 
 #include "AutoRemoteSyscalls.h"
 
+#include <limits.h>
+
 #include "rr/rr.h"
 
 #include "kernel_metadata.h"