PATH_MAX is in limits.h on Linux.

Patch by Marco Minutoli <mminutoli@gmail.com>

llvm-svn: 131304
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
index 93e4166..ac99855 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
@@ -11,6 +11,7 @@
 #include "GDBRemoteCommunication.h"
 
 // C Includes
+#include <limits.h>
 #include <string.h>
 
 // C++ Includes