[K/N][build] Add comment about dependency and cross build

kotlin-native/build.gradle

@@ -413,6 +413,14 @@ def endorsedLibsCopyTask = task("crossDistEndorsedLibrariesCopy", type: Copy) {
 targetList.each { target ->
     task("${target}CrossDistStdlib", type: Copy) {
         dependsOn ":kotlin-native:runtime:${target}Stdlib"
+        // TODO: add explicit dependency on host task with IR klib stdlib parts
+        // As for now it is possibly to build up distribution from the tc-dist to crossdist
+        // by request of tests that need cross-targets or platform libs. It may create undesired
+        // issues with overwriting the file being used by the concurrent build/test.
+        // This building (by request) should be turned off when this to-do is fixed.
+//        if (target != hostName) {
+//            dependsOn ":kotlin-native:${hostName}CrossDistStdlib"
+//        }
 
         destinationDir project.file("$distDir/$stdlib")