[MIPS] Implementation of sel_ldr for MIPS architecture.

src/trusted/service_runtime/nacl.scons

Index: src/trusted/service_runtime/nacl.scons
diff --git a/src/trusted/service_runtime/nacl.scons b/src/trusted/service_runtime/nacl.scons
index 86b477ac231a038ed41ce85b94ee6b49952fc3ad..69ebffcd231e1947c181691e28ff1d327d9c63af 100644
--- a/src/trusted/service_runtime/nacl.scons
+++ b/src/trusted/service_runtime/nacl.scons
@@ -33,6 +33,8 @@ elif env.Bit('target_x86_64'):
   nacl_text_pad_asm = 'arch/x86_64/nacl_text_pad_test.S'
 elif env.Bit('target_arm'):
   nacl_text_pad_asm = 'arch/arm/nacl_text_pad_test.S'
+elif env.Bit('target_mips32'):
+  nacl_text_pad_asm = 'arch/mips/nacl_text_pad_test.S'
 else:
   raise Exception('unknown architecture')
 
@@ -57,6 +59,8 @@ def NewAsmEnv(env, defines, rodata_address, rwdata_address):
     link_cmd += ' -melf64_nacl'
   elif env.Bit('target_arm'):
     link_cmd += ' -marmelf_nacl'
+  elif env.Bit('target_mips32'):
+    link_cmd += ' -mmipselelf_nacl'
   else:
     raise Exception('unknown architecture')