Move ConnectionFileDescriptor to platform-specific Host directory.

As part of getting ConnectionFileDescriptor working on Windows,
there is going to be alot of platform specific work to be done.
As a result, the implementation is moving into Host.  This patch
performs the code move and fixes up call-sites appropriately.

Reviewed by: Greg Clayton
Differential Revision: http://reviews.llvm.org/D5548

llvm-svn: 219143
diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
index 03c0a1d..d2dc246 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -31,7 +31,7 @@
 #include "lldb/Interpreter/Args.h"
 #include "lldb/Core/ArchSpec.h"
 #include "lldb/Core/Debugger.h"
-#include "lldb/Core/ConnectionFileDescriptor.h"
+#include "lldb/Host/ConnectionFileDescriptor.h"
 #include "lldb/Host/FileSpec.h"
 #include "lldb/Core/Module.h"
 #include "lldb/Core/ModuleSpec.h"