Dropping fdopen workaround now that glibc has been fixed.

native_client_sdk/src/libraries/nacl_io/library.dsc

 {
   'TOOLS': ['newlib', 'glibc', 'bionic', 'pnacl', 'linux'],
   'SEARCH': [
     '.',
     'pepper',
     '../third_party/newlib-extras',
     'include',
   ],
   'TARGETS': [
     {
@@ skipping 64 matching lines @@
         "syscalls/cfsetspeed.c",
         "syscalls/chdir.c",
         "syscalls/chmod.c",
         "syscalls/chown.c",
         "syscalls/connect.c",
         "syscalls/fchdir.c",
         "syscalls/fchmod.c",
         "syscalls/fchown.c",
         "syscalls/fcntl.c",
         "syscalls/fdatasync.c",
-        "syscalls/fdopen.c",
         "syscalls/freeaddrinfo.c",
         "syscalls/fsync.c",
         "syscalls/ftruncate.c",
         "syscalls/gai_strerror.c",
         "syscalls/getaddrinfo.c",
         "syscalls/getcwd.c",
         "syscalls/gethostbyname.c",
         "syscalls/getpeername.c",
         "syscalls/getsockname.c",
         "syscalls/getsockopt.c",
@@ skipping 191 matching lines @@
         "all_interfaces.h",
         "define_empty_macros.h",
         "undef_macros.h",
       ],
       'DEST': 'include/nacl_io/pepper',
     }
   ],
   'DEST': 'src',
   'NAME': 'nacl_io',
 }