set the kind on alias completions

Author: mhegazy

src/services/services.ts

@@ -1025,6 +1025,8 @@ module ts {
         static primitiveType = "primitive type";
 
         static label = "label";
+
+        static alias = "alias"
     }
 
     export class ScriptElementKindModifier {
@@ -2293,6 +2295,7 @@ module ts {
             if (flags & SymbolFlags.Constructor) return ScriptElementKind.constructorImplementationElement;
             if (flags & SymbolFlags.TypeParameter) return ScriptElementKind.typeParameterElement;
             if (flags & SymbolFlags.EnumMember) return ScriptElementKind.variableElement;
+            if (flags & SymbolFlags.Import) return ScriptElementKind.alias;
 
             return ScriptElementKind.unknown;
         }

tests/cases/fourslash/completionListOnAliases.ts

@@ -9,7 +9,7 @@
 ////}
 
 goTo.marker("1");
-verify.memberListContains("x");
+verify.memberListContains("x", undefined, undefined, undefined ,/*kind: */ "alias");
 
 goTo.marker("2");
 verify.memberListContains("value");