Fix one place I missed that was memcpy'ing TypeLocs in a way that messes
up alignment.

Fixes utilities/tuple/tuple.tuple/tuple.creation/tuple_cat.pass.cpp from the
libc++ testsuite.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184397 91177308-0d34-0410-b5e6-96231b3b80d8