This patch removes %T from clang lit tests. %T has been deprecated for
about seven years and is not reccomended as it is not unique to each
test, which can lead to races. This patch is intended to remove usage in
tree with the end goal of removing support for %T within lit.
Previsouly the module-initializer*.cpp lives in the CodeGen dir instead
of CodeGenCXX dir, which is not consistency with other tests since
modules are features for C++.
