Fix some incorrect fields in our generated PDBs.

Fix some incorrect fields in our generated PDBs.

Most of these are pretty trivial and obvious. Setting the toolchain
version to 14.11 is perhaps a little questionable, but we've been bitten
in the past where one of our version fields sidn't match MSVC's, and I
definitely don't want to go through that diagnosis again as it was
pretty time consuming and hard to track down.

I found all of these by using llvm-pdbutil export to dump the dbi and
pdb streams to a file, then using fc followed by llvm-pdbutil explain to
explain the mismatched bytes.

There are still some more, these are just the low hanging fruit.

Differential Revision: https://reviews.llvm.org/D45276

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330130 91177308-0d34-0410-b5e6-96231b3b80d8