new compiler mode: stdlib

include jdk-headers, do not include runtime

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/CompilerSpecialMode.java

@@ -23,4 +23,10 @@ public enum CompilerSpecialMode {
     REGULAR,
     BUILTINS,
     JDK_HEADERS,
+    STDLIB,
+    ;
+
+    public boolean includeJdkHeaders() {
+        return this == REGULAR || this == STDLIB;
+    }
 }

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/PsiClassFinderForJvm.java

@@ -62,7 +62,7 @@ public class PsiClassFinderForJvm implements PsiClassFinder {
     @PostConstruct
     public void initialize() {
         this.altClassFinder = new AltClassFinder(project,
-                compilerSpecialMode == CompilerSpecialMode.REGULAR ? PathUtil.getAltHeadersRoots() : Collections.<VirtualFile>emptyList());
+                compilerSpecialMode.includeJdkHeaders() ? PathUtil.getAltHeadersRoots() : Collections.<VirtualFile>emptyList());
         this.javaSearchScope = new DelegatingGlobalSearchScope(GlobalSearchScope.allScope(project)) {
             @Override
             public boolean contains(VirtualFile file) {