Revert "[clang] roll-forward "[clang] Mark `trivial_abi` types as "trivially relocatable""."

This reverts commit 56d46b36.

The LIT test SemaCXX/attr-trivial-abi.cpp is failing with 32bit build on
Windows. All the lines with the ifdef WIN32 are asserting but they are
not expected to. It looks like the LIT test was not tested on a	32bit
build of the compiler.