Introduce a non-uglified syntax for module imports in Objective-C:

  @import identifier [. identifier]* ;



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147452 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DeclPrinter.cpp b/lib/AST/DeclPrinter.cpp
index 73dac3b..33ddd5a 100644
--- a/lib/AST/DeclPrinter.cpp
+++ b/lib/AST/DeclPrinter.cpp
@@ -647,7 +647,7 @@
 }
 
 void DeclPrinter::VisitImportDecl(ImportDecl *D) {
-  Out << "__import_module__ " << D->getImportedModule()->getFullModuleName()
+  Out << "@import " << D->getImportedModule()->getFullModuleName()
       << ";\n";
 }