There are 3 changes:
* Renamed genertor.pass.cpp to generator.pass.cpp
* Removed nothing_to_do.pass.cpp
* Mark GCC 4.9 as UNSUPPORTED for the test files that have negative
narrowing conversion SFINAE test (see GCC PR63723).
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@330655 91177308-0d34-0410-b5e6-96231b3b80d8