remove #if logic for openocd_sleep_*lude

Adds server_stubs.c to hold these routines, using automake logic to
ensure it gets included under the right conditions.

src/server/Makefile.am

@@ -13,6 +13,10 @@ libserver_la_SOURCES = server.c telnet_server.c gdb_server.c
 
 if HTTPD
 libserver_la_SOURCES += httpd.c
+else
+if !ECOSBOARD
+libserver_la_SOURCES += server_stubs.c
+endif
 endif
 noinst_HEADERS += httpd.h