Add gyp build of sel_ldr and irt_core for ARM

build/nacl_core_sdk.gyp

 # Copyright (c) 2012 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.
 
 {
   'includes': [
     'common.gypi',
   ],
   'targets': [
     {
       'target_name': 'nacl_core_sdk',
       'type': 'none',
       'dependencies': [
+        '../src/untrusted/irt/irt.gyp:irt_core_nexe',
         '../src/untrusted/minidump_generator/minidump_generator.gyp:minidump_generator_lib',
         '../src/untrusted/nacl/nacl.gyp:nacl_dynacode_lib',
         '../src/untrusted/nacl/nacl.gyp:nacl_exception_lib',
         '../src/untrusted/nacl/nacl.gyp:nacl_lib',
         '../src/untrusted/nacl/nacl.gyp:nacl_list_mappings_lib',
         '../src/untrusted/nosys/nosys.gyp:nosys_lib',
         '../src/untrusted/pthread/pthread.gyp:pthread_lib',
       ],
       'conditions': [
+        ['(target_arch!="arm" and target_arch!="mipsel") or OS=="linux"', {
+          # sel_ldr is not buildable for arm, except on linux.
+          'dependencies': [
+            '../src/trusted/service_runtime/service_runtime.gyp:sel_ldr',
+          ],
+        }],
         ['target_arch!="arm" and target_arch!="mipsel"', {
           'dependencies': [
-            # sel_ldr and irt are host-only and not needed when building the
-            # arm and mips components of the SDK.
-            '../src/untrusted/irt/irt.gyp:irt_core_nexe',
-            '../src/trusted/service_runtime/service_runtime.gyp:sel_ldr',
             # these libraries don't currently exist on arm and mips
             '../src/untrusted/valgrind/valgrind.gyp:dynamic_annotations_lib',
             '../src/untrusted/valgrind/valgrind.gyp:valgrind_lib',
           ],
           'copies': [
             {
               'destination': '<(SHARED_INTERMEDIATE_DIR)/sdk/toolchain/<(OS)_x86_newlib/x86_64-nacl/lib32',
               'files': [
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/crti.o',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/crtn.o',
@@ skipping 34 matching lines @@
                 '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib64/libdynamic_annotations.a',
               ],
             },
           ],
         }],
       ],
     },
   ],
 }