[K/N] Add a link for the target deprecation message

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanDriver.kt

@@ -30,6 +30,8 @@ private val deprecatedTargets = setOf(
         KonanTarget.WASM32
 )
 
+private const val DEPRECATION_LINK = "https://kotl.in/native-targets-tiers"
+
 class KonanDriver(
         val project: Project,
         val environment: KotlinCoreEnvironment,
@@ -61,7 +63,8 @@ class KonanDriver(
 
         // Avoid showing warning twice in 2-phase compilation.
         if (konanConfig.produce != CompilerOutputKind.LIBRARY && konanConfig.target in deprecatedTargets) {
-            configuration.report(CompilerMessageSeverity.STRONG_WARNING, "target ${konanConfig.target} is deprecated and will be removed soon.")
+            configuration.report(CompilerMessageSeverity.STRONG_WARNING,
+                    "target ${konanConfig.target} is deprecated and will be removed soon. See $DEPRECATION_LINK")
         }
 
         ensureModuleName(konanConfig)

native/utils/src/org/jetbrains/kotlin/konan/target/KonanTarget.kt

@@ -8,7 +8,8 @@ package org.jetbrains.kotlin.konan.target
 import org.jetbrains.kotlin.konan.util.Named
 import java.io.Serializable
 
-const val DEPRECATED_TARGET_MESSAGE = "Target is deprecated and will be removed soon"
+private const val DEPRECATION_LINK = "https://kotl.in/native-targets-tiers"
+const val DEPRECATED_TARGET_MESSAGE = "Target is deprecated and will be removed soon. See $DEPRECATION_LINK"
 
 sealed class KonanTarget(override val name: String, val family: Family, val architecture: Architecture) : Named, Serializable {
     object ANDROID_X64 : KonanTarget("android_x64", Family.ANDROID, Architecture.X64)