Support compilation against modular JDK (9+)

For more information about the "jrt" file system, see
http://openjdk.java.net/jeps/220 and
https://bugs.openjdk.java.net/browse/JDK-8066492.

This commit fixes DiagnosticsWithJdk9TestGenerated.testKt11167

 #KT-11167 Fixed

compiler/frontend.java/src/org/jetbrains/kotlin/config/JVMConfigurationKeys.java

@@ -39,6 +39,9 @@ public class JVMConfigurationKeys {
     public static final CompilerConfigurationKey<Boolean> INCLUDE_RUNTIME =
             CompilerConfigurationKey.create("include runtime to the resulting .jar");
 
+    public static final CompilerConfigurationKey<File> JDK_HOME =
+            CompilerConfigurationKey.create("jdk home");
+
     public static final CompilerConfigurationKey<List<KotlinScriptDefinition>> SCRIPT_DEFINITIONS =
             CompilerConfigurationKey.create("script definitions");