Rollback the (functional) effect of 13944 and 14134
Re-opening the FIFO before closing it gives (difficult to understand)
problems => rollback the change that keeps the FIFO opened.
Rather handle the race condition by retrying at vgdb side.
See extensive comments in remote-utils.c



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14147 a5019735-40e9-0310-863c-91ae7b9d1cf9