[K/N] Disable debug info in runtime by default

Bundle grows 200mb if debug info is enabled, it's too much.
But probably, this can be useful for debug, so we need gradle option.

kotlin-native/HACKING.md

@@ -162,6 +162,15 @@ To generate a compilation database for the Kotlin/Native runtime, run the Gradle
 This task generates `<path_to_kotlin>/kotlin-native/compile_commands.json` file that should be opened in CLion as project.
 Other developer tools also can use generated compilation database, but then `clangd` tool should be installed manually.
 
+Also, it's possible to build Kotlin/Native runtime with dwarf debug information, which can be useful for debugging.
+To do this you should add `kotlin.native.isNativeRuntimeDebugInfoEnabled=true` line to `local.properties` file. Note, that changing
+this property requires clean compiler rebuild with gradle daemon restart.
+
+Unfortunately, this feature works quite unstable because of using several llvm versions simultaneously,
+so it's need to be additionally enabled while compiling application with `-Xbinary=stripDebugInfoFromNativeLibs=false`
+compiler flag or corresponding setting in gradle build script. After doing this, Kotlin/Native runtime in application
+is debuggable in CLion, with Attach to process tool.
+
  ## Performance measurement
   
  Firstly, it's necessary to build analyzer tool to have opportunity to compare different performance results: