Create a build_config header file.

src/trusted/platform_qualify/arch/arm/nacl_qualify_sandbox_instrs.c

 /*
  * Copyright (c) 2013 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <setjmp.h>
 #include <signal.h>
 #include <stdint.h>
 #include <stdlib.h>
 
+#include "native_client/src/include/build_config.h"
 #include "native_client/src/include/nacl_macros.h"
 #include "native_client/src/include/arm_sandbox.h"
 #include "native_client/src/trusted/platform_qualify/arch/arm/nacl_arm_qualify.h"
 
 static sigjmp_buf try_state;
 
 static void signal_catch(int sig) {
   siglongjmp(try_state, sig);
 }
 
@@ skipping 43 matching lines @@
   }
 
 #if NACL_ANDROID
   (void) sigaction(SIGBUS, &old_sigaction_bus, NULL);
 #endif
   (void) sigaction(SIGILL, &old_sigaction_ill, NULL);
   (void) sigaction(SIGTRAP, &old_sigaction_trap, NULL);
 
   return !fell_through;
 }