Change @import to @__experimental_modules_import.  We are not ready to commit to a particular syntax for modules,
and don't have time to push it forward in the near future.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151841 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Modules/submodules.cpp b/test/Modules/submodules.cpp
index 1417446..60d5ae0 100644
--- a/test/Modules/submodules.cpp
+++ b/test/Modules/submodules.cpp
@@ -2,7 +2,7 @@
 // RUN: %clang_cc1 -x objective-c++ -fmodule-cache-path %t -fmodules -I %S/Inputs/submodules %s -verify
 // FIXME: When we have a syntax for modules in C++, use that.
 
-@import std.vector;
+@__experimental_modules_import std.vector;
 
 vector<int> vi;
 
@@ -10,20 +10,20 @@
 remove_reference<int&>::type *int_ptr = 0; // expected-error{{unknown type name 'remove_reference'}} \
 // expected-error{{expected unqualified-id}}
 
-@import std.typetraits; // expected-error{{no submodule named 'typetraits' in module 'std'; did you mean 'type_traits'?}}
+@__experimental_modules_import std.typetraits; // expected-error{{no submodule named 'typetraits' in module 'std'; did you mean 'type_traits'?}}
 
 vector<float> vf;
 remove_reference<int&>::type *int_ptr2 = 0;
 
-@import std.vector.compare; // expected-error{{no submodule named 'compare' in module 'std.vector'}}
+@__experimental_modules_import std.vector.compare; // expected-error{{no submodule named 'compare' in module 'std.vector'}}
 
-@import std; // import everything in 'std'
+@__experimental_modules_import std; // import everything in 'std'
 
 // hash_map still isn't available.
 hash_map<int, float> ints_to_floats; // expected-error{{unknown type name 'hash_map'}} \
 // expected-error{{expected unqualified-id}}
 
-@import std.hash_map;
+@__experimental_modules_import std.hash_map;
 
 hash_map<int, float> ints_to_floats2;