Move KonanBuiltIns to a separate module (#1860)

1. Separate (temporary) modules for the code to be moved to https://github.com/JetBrains/kotlin repo
2. KonanBuiltIns, functions for creation of module descriptors and interop descriptors and moved to "konan.descriptors" module 
3. Re-organizing KonanModuleOrigin and it's inheritors to better naming/understanding

klib/src/main/kotlin/org/jetbrains/kotlin/cli/klib/main.kt

@@ -17,7 +17,6 @@
 package org.jetbrains.kotlin.cli.klib
 
 // TODO: Extract `library` package as a shared jar?
-import org.jetbrains.kotlin.backend.konan.isStdlib
 import org.jetbrains.kotlin.backend.konan.library.impl.LibraryReaderImpl
 import org.jetbrains.kotlin.backend.konan.library.impl.UnzippedKonanLibrary
 import org.jetbrains.kotlin.backend.konan.library.impl.ZippedKonanLibrary
@@ -26,6 +25,7 @@ import org.jetbrains.kotlin.config.ApiVersion
 import org.jetbrains.kotlin.config.LanguageVersion
 import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
 import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
+import org.jetbrains.kotlin.descriptors.konan.isKonanStdlib
 import org.jetbrains.kotlin.konan.file.File
 import org.jetbrains.kotlin.konan.library.KonanLibrarySearchPathResolver
 import org.jetbrains.kotlin.konan.target.Distribution
@@ -146,7 +146,7 @@ class Library(val name: String, val requestedRepository: String?, val target: St
         val versionSpec = LanguageVersionSettingsImpl(currentLanguageVersion, currentApiVersion)
         val module = reader.moduleDescriptor(versionSpec)
         val defaultModules = mutableListOf<ModuleDescriptorImpl>()
-        if (!module.isStdlib()) {
+        if (!module.isKonanStdlib()) {
             val resolver = KonanLibrarySearchPathResolver(emptyList(),
                     target = null,
                     distributionKlib = Distribution().klib,