Reworked all the utilities/meta tests to use ASSERT_SAME_TYPE instead of 'static_assert( is_same<'. Much easier to read. I left two tests alone: is_same.pass.cpp, which should call 'is_same' directly, and common_type.pass.cpp, which Eric is working on. NFC intended

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@357146 91177308-0d34-0410-b5e6-96231b3b80d8
27 files changed