Rename "import jet" to "import kotlin" in Java sources

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/kotlin/VirtualFileKotlinClass.java

@@ -18,7 +18,7 @@ package org.jetbrains.jet.lang.resolve.kotlin;
 
 import com.intellij.openapi.util.Ref;
 import com.intellij.openapi.vfs.VirtualFile;
-import jet.Function0;
+import kotlin.Function0;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.asm4.ClassReader;
@@ -221,4 +221,4 @@ public class VirtualFileKotlinClass implements KotlinJvmBinaryClass {
     public String toString() {
         return getClass().getSimpleName() + ": " + file.toString();
     }
-}
+}