Add option to restore fallback to compiler built-ins + resurrect Maven build

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArguments.java

@@ -101,6 +101,9 @@ public class K2JVMCompilerArguments extends CommonCompilerArguments {
     @Argument(value = "Xsingle-module", description = "Combine modules for source files and binary dependencies into a single module")
     public boolean singleModule;
 
+    @Argument(value = "Xadd-compiler-builtins", description = "Add definitions of built-in declarations to the compilation classpath (useful with -no-stdlib)")
+    public boolean addCompilerBuiltIns;
+
     @Argument(value = "Xinterface-compatibility", description = "Generate DefaultImpls classes for interfaces in JVM target bytecode version 1.8 for binary compatibility with 1.6")
     public boolean interfaceCompatibility;