[modules] Merging for class-scope using-declarations.

llvm-svn: 219657
diff --git a/clang/test/Modules/Inputs/merge-using-decls/module.modulemap b/clang/test/Modules/Inputs/merge-using-decls/module.modulemap
new file mode 100644
index 0000000..a415527
--- /dev/null
+++ b/clang/test/Modules/Inputs/merge-using-decls/module.modulemap
@@ -0,0 +1,2 @@
+module A { header "a.h" }
+module B { header "b.h" }