Update mojo sdk to rev f6c8ec07c01deebc13178d516225fd12695c3dc2

mojo/nacl/generator/libmojo.cc.tmpl

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 {{generator_warning}}
 
 #include "mojo/public/c/system/core.h"
 #include "native_client/src/public/chrome_main.h"
 #include "native_client/src/public/imc_syscalls.h"
 #include "native_client/src/public/imc_types.h"
 
-#define NACL_MOJO_DESC (NACL_CHROME_DESC_BASE + 2)
+// The value for this FD must not conflict with uses inside Chromium. However,
+// mojo/nacl doesn't depend on any Chromium headers, so we can't use a #define
+// from there.
+#define NACL_MOJO_DESC (NACL_CHROME_DESC_BASE + 3)
 
 static void DoMojoCall(uint32_t params[], nacl_abi_size_t num_params) {
   NaClAbiNaClImcMsgIoVec iov[1] = {
     {params, num_params}
   };
   NaClAbiNaClImcMsgHdr msgh = {iov, 1, NULL, 0};
   // Note: return value unchecked.  We're relying on the result parameter being
   // unmodified - if the syscall fails, the Mojo function will return whatever
   // the result parameter was initialized to before this function was called.
   imc_sendmsg(NACL_MOJO_DESC, &msgh, 0);
 }
 
 {{body}}