Replace more usages of __func__ with LLVM_FUNCTION_NAME


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172161 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "tg-fixits.td: fixup for Linux"

It's better to show no caret/ranges/fixits than to show them misaligned.
(It scares me a bit that Clang is going to show them misaligned on
systems without a proper llvm::sys::locale::columnWidth.) See PR14910.

This reverts commit a03cc72bedd015b7eb76e9ac650992f58a48549d.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172163 91177308-0d34-0410-b5e6-96231b3b80d8