Move StringExtractorGDBRemote.h to the include folder

While trying to use this header I noticed that it is not in the include
folder. Move it to there and update all #includes to reference that file
correctly.

llvm-svn: 327996
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp
index 4be92b7..4fc1fc7 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServer.cpp
@@ -19,8 +19,8 @@
 
 // Project includes
 #include "ProcessGDBRemoteLog.h"
-#include "Utility/StringExtractorGDBRemote.h"
 #include "lldb/Utility/StreamString.h"
+#include "lldb/Utility/StringExtractorGDBRemote.h"
 
 using namespace lldb;
 using namespace lldb_private;