[libclang] Further simplify the indexing API.

That stuff can be added later on if we need them.
Also add some const goodness.

llvm-svn: 144446
diff --git a/clang/tools/libclang/libclang.exports b/clang/tools/libclang/libclang.exports
index b644baa..4596336 100644
--- a/clang/tools/libclang/libclang.exports
+++ b/clang/tools/libclang/libclang.exports
@@ -137,10 +137,9 @@
 clang_hashCursor
 clang_index_getObjCCategoryDeclInfo
 clang_index_getObjCContainerDeclInfo
-clang_index_getTagDeclInfo
-clang_index_isEntityObjCCategoryKind
+clang_index_getObjCInterfaceDeclInfo
+clang_index_getObjCProtocolDeclInfo
 clang_index_isEntityObjCContainerKind
-clang_index_isEntityTagKind
 clang_indexLoc_getCXSourceLocation
 clang_indexLoc_getFileLocation
 clang_indexTranslationUnit