[TargetLibraryInfo] Update run time support for Windows

It seems that, since VC19, the `float` C99 math functions are supported for all
targets, unlike the C89 ones.

According to the discussion at https://reviews.llvm.org/D57625.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353758 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed