Better work with libraries names

compiler/util/src/org/jetbrains/jet/utils/KotlinPathsFromHomeDir.java

@@ -43,7 +43,7 @@ public class KotlinPathsFromHomeDir implements KotlinPaths {
     @Override
     @NotNull
     public File getRuntimePath() {
-        return getLibraryFile("kotlin-runtime.jar");
+        return getLibraryFile(PathUtil.KOTLIN_JAVA_RUNTIME_JAR);
     }
 
     @Override

compiler/util/src/org/jetbrains/jet/utils/PathUtil.java

@@ -30,6 +30,7 @@ public class PathUtil {
     public static final String JS_LIB_JAR_NAME = "kotlin-jslib.jar";
     public static final String JS_LIB_JS_NAME = "kotlinEcma3.js";
     public static final String JDK_ANNOTATIONS_JAR = "kotlin-jdk-annotations.jar";
+    public static final String KOTLIN_JAVA_RUNTIME_JAR = "kotlin-runtime.jar";
 
     private static final File NO_PATH = new File("<no_path>");