JVM_IR: Generate java 8 parameter names when -java-parameters is passed.

The type mapper does not map enum parameters and outer this parameters
to the right parameter signature kinds so around half the tests
are still failing. Since a new type mapper is being worked
on I will not investigate that further right now.

compiler/backend/src/org/jetbrains/kotlin/codegen/generateJava8ParameterNames.kt

@@ -23,7 +23,7 @@ import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature
 import org.jetbrains.org.objectweb.asm.MethodVisitor
 import org.jetbrains.org.objectweb.asm.Opcodes
 
-internal fun generateParameterNames(
+fun generateParameterNames(
         functionDescriptor: FunctionDescriptor,
         mv: MethodVisitor,
         jvmSignature: JvmMethodSignature,