[MIPS] Modify LongBranch expansion to work with sandboxing

lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h

 //===-- MipsFixupKinds.h - Mips Specific Fixup Entries ----------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_MIPS_MIPSFIXUPKINDS_H
@@ skipping 110 matching lines @@
 
     // resulting in - R_MIPS_GOT_LO16
     fixup_Mips_GOT_LO16,
 
     // resulting in - R_MIPS_CALL_HI16
     fixup_Mips_CALL_HI16,
 
     // resulting in - R_MIPS_CALL_LO16
     fixup_Mips_CALL_LO16,
 
+    // @LOCALMOD-START
+    fixup_Mips_NACL_LONG_BRANCH_HI16,
+    fixup_Mips_NACL_LONG_BRANCH_LO16,
+    // @LOCALMOD-END
+
     // Marker
     LastTargetFixupKind,
     NumTargetFixupKinds = LastTargetFixupKind - FirstTargetFixupKind
   };
 } // namespace Mips
 } // namespace llvm
 
 
 #endif // LLVM_MIPS_MIPSFIXUPKINDS_H