Enable snapshots on MIPS. This is based on

src/mips/assembler-mips.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 832 matching lines @@
 }
 
 // We have to use a temporary register for things that can be relocated even
 // if they can be encoded in the MIPS's 16 bits of immediate-offset instruction
 // space.  There is no guarantee that the relocated location can be similarly
 // encoded.
 bool Assembler::MustUseReg(RelocInfo::Mode rmode) {
   return rmode != RelocInfo::NONE;
 }
 
-
 void Assembler::GenInstrRegister(Opcode opcode,
                                  Register rs,
                                  Register rt,
                                  Register rd,
                                  uint16_t sa,
                                  SecondaryField func) {
   ASSERT(rd.is_valid() && rs.is_valid() && rt.is_valid() && is_uint5(sa));
   Instr instr = opcode | (rs.code() << kRsShift) | (rt.code() << kRtShift)
       | (rd.code() << kRdShift) | (sa << kSaShift) | func;
   emit(instr);
@@ skipping 1407 matching lines @@
   }
 
   if (patched) {
       CPU::FlushICache(pc+2, sizeof(Address));
   }
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS