MIPS64: Fix build failure

Compiler didn't know whether to choose definition
of Operand method with pointer argument or integer argument defined in
src/mips64/assembler-mips64.h

Change-Id: I0887df6ce7aa6ba6be166d415b1b5574368b3a4a
Reviewed-on: https://chromium-review.googlesource.com/c/1378180Reviewed-by: Sreten Kovacevic <skovacevic@wavecomp.com>
Commit-Queue: Predrag Rudic <prudic@wavecomp.com>
Cr-Commit-Position: refs/heads/master@{#58247}

src/builtins/mips64/builtins-mips64.cc

@@ -2896,7 +2896,7 @@ void Builtins::Generate_InternalArrayConstructorImpl(MacroAssembler* masm) {
 
     // No arguments should be passed.
     __ Assert(eq, AbortReason::kWrongNumberOfArgumentsForInternalPackedArray,
-              a0, Operand(0));
+              a0, Operand(static_cast<int64_t>(0)));
   }
 
   __ Jump(