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/tools/lldb-platform/lldb-platform.cpp b/lldb/tools/lldb-platform/lldb-platform.cpp
index 0ab292a..5c8057d 100644
--- a/lldb/tools/lldb-platform/lldb-platform.cpp
+++ b/lldb/tools/lldb-platform/lldb-platform.cpp
@@ -25,10 +25,10 @@
 // Other libraries and framework includes
 #include "lldb/lldb-private-log.h"
 #include "lldb/Core/Error.h"
-#include "lldb/Core/ConnectionFileDescriptor.h"
 #include "lldb/Core/ConnectionMachPort.h"
 #include "lldb/Core/Debugger.h"
 #include "lldb/Core/StreamFile.h"
+#include "lldb/Host/ConnectionFileDescriptor.h"
 #include "lldb/Host/HostGetOpt.h"
 #include "lldb/Host/OptionParser.h"
 #include "lldb/Interpreter/CommandInterpreter.h"