[K/N] Separate ClangArgs for jni and native

Since LLVM for Windows is now native instead on MinGW, we have to
compile code in a different environment in case of JNI. This commits
just separates ClangArgs into two subclasses without actual behavior
changes.

kotlin-native/llvmDebugInfoC/build.gradle.kts

@@ -28,8 +28,6 @@ val llvmDir = project.findProperty("llvmDir")
 
 native {
     val obj = if (HostManager.hostIsMingw) "obj" else "o"
-    val host = rootProject.project(":kotlin-native").extra["hostName"]
-    val hostLibffiDir = rootProject.project(":kotlin-native").extra["${host}LibffiDir"]
     val cxxflags = mutableListOf(
         "--std=c++17",
         "-I${llvmDir}/include",
@@ -37,7 +35,7 @@ native {
     )
     suffixes {
         (".cpp" to ".$obj") {
-            tool(*platformManager.hostPlatform.clang.clangCXX("").toTypedArray())
+            tool(*platformManager.hostPlatform.clangForJni.clangCXX("").toTypedArray())
             flags(*cxxflags.toTypedArray(), "-c", "-o", ruleOut(), ruleInFirst())
         }
 
@@ -50,7 +48,7 @@ native {
     val objSet = sourceSets["main"]!!.transform(".cpp" to ".$obj")
 
     target(lib("debugInfo"), objSet) {
-        tool(*platformManager.hostPlatform.clang.llvmAr("").toTypedArray())
+        tool(*platformManager.hostPlatform.clangForJni.llvmAr("").toTypedArray())
         flags("-qv", ruleOut(), *ruleInAll())
     }
 }