change #include "gdb_server.h" to <server/gdb_server.h>

Changes from the flat namespace to heirarchical one.  Instead of writing:

	#include "gdb_server.h"

the following form should be used.

	#include <server/gdb_server.h>

The exception is from .c files in the same directory.

src/ecosboard.c

@@ -32,7 +32,7 @@
 
 #include "server.h"
 #include "telnet_server.h"
-#include "gdb_server.h"
+#include <server/gdb_server.h>
 #include "openocd.h"
 
 #include <time_support.h>

src/openocd.c

@@ -39,7 +39,7 @@
 #include <flash/mflash.h>
 
 #include "server.h"
-#include "gdb_server.h"
+#include <server/gdb_server.h>
 #include "httpd.h"
 
 #ifdef HAVE_STRINGS_H