Update autotools files

We're not particularly tied to old versions of autotools for any reason, are we? No rush here, but `compile` and `ar-lib` would be nice to have more up-to-date versions of for MSVC purposes.

I generated this PR by the following:
```
rm ar-lib compile config.guess config.sub install-sh missing depcomp
AUTOMAKE=automake-1.14 ACLOCAL=aclocal-1.14 ./autogen.sh
```