Add temporary compiler option to suppress incompatibility errors

To compile Kotlin against current IDEA libraries until they are migrated to 1.1

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

@@ -70,6 +70,9 @@ public class K2JVMCompilerArguments extends CommonCompilerArguments {
     @Argument(value = "Xallow-kotlin-package", description = "Allow compiling code in package 'kotlin'")
     public boolean allowKotlinPackage;
 
+    @Argument(value = "Xskip-metadata-version-check", description = "Try loading binary incompatible classes, may cause crashes")
+    public boolean skipMetadataVersionCheck;
+
     // Paths to output directories for friend modules.
     public String[] friendPaths;