Support for merging UsingPackDecls across modules.Fixes a false-positive error if the same std::variant<...> type isinstantiated across multiple modules.
[Test] NFC: Fixed typo in commentsChanged "declerations" to "declarations"llvm-svn: 296648
[Test] Make Lit tests C++11 compatible #10Differential Revision: https://reviews.llvm.org/D21626llvm-svn: 296193
[modules] Merging for class-scope using-declarations.llvm-svn: 219657