Force inlining of NativeMath functions

Author: plokhotnyuk

jsoniter-scala-core/native/src/main/scala/com/github/plokhotnyuk/jsoniter_scala/core/NativeMath.scala

@@ -1,12 +1,15 @@
 package com.github.plokhotnyuk.jsoniter_scala.core
 
+import scala.scalanative.annotation.alwaysinline
 import scala.scalanative.unsafe._
 
 @extern
 private[core] object NativeMath {
+  @alwaysinline
   @name("jsoniter_scala_multiply_high")
   def multiplyHigh(x: Long, y: Long): Long = extern
 
+  @alwaysinline
   @name("jsoniter_scala_unsigned_multiply_high")
   def unsignedMultiplyHigh(x: Long, y: Long): Long = extern
 }