Convert SemaTemplate*.cpp to pass a callback object to CorrectTypo.

The change to SemaTemplateVariadic.cpp improves the typo correction
results in certain situations, while the change to SemaTemplate.cpp
does not change existing behavior.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148155 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed