[MIPS] Use break instruction as NACL_HALT for MIPS.

src/trusted/service_runtime/arch/mips/sel_ldr_mips.h

Index: src/trusted/service_runtime/arch/mips/sel_ldr_mips.h
diff --git a/src/trusted/service_runtime/arch/mips/sel_ldr_mips.h b/src/trusted/service_runtime/arch/mips/sel_ldr_mips.h
index 9161f0c02e871c6dd059f2c0037b69ce3474b0c2..48205004c40c600e034571b63c779ec98a17e387 100644
--- a/src/trusted/service_runtime/arch/mips/sel_ldr_mips.h
+++ b/src/trusted/service_runtime/arch/mips/sel_ldr_mips.h
@@ -7,7 +7,12 @@
 #ifndef SERVICE_RUNTIME_ARCH_MIPS_SEL_LDR_H__
 #define SERVICE_RUNTIME_ARCH_MIPS_SEL_LDR_H__ 1
 
+#if !defined(__ASSEMBLER__)
+
 #include "native_client/src/include/portability.h"
+
+#endif
+
 #include "native_client/src/trusted/service_runtime/nacl_config.h"
 
 #define NACL_MAX_ADDR_BITS      30
@@ -21,7 +26,7 @@
 #define NACL_THREAD_MAX         8192
 
 #define NACL_NOOP_OPCODE        0x00000000  /* nop */
-#define NACL_HALT_OPCODE        0x00000008  /* jr $0 */
+#define NACL_HALT_OPCODE        0x0000000D  /* break */
 #define NACL_HALT_LEN           4           /* length of halt instruction */
 #define NACL_HALT_WORD          NACL_HALT_OPCODE