Autoconf 1.14

@agorrod, @michaelcahill, @sueloverso -- here's a set of changes that mostly makes the tree build with automake 1.14.

It's not complete, I'm just pushing this branch so we have something to talk about.

The big change I saw is configuring automake with `subdir-objects`.  Automake 1.14 wants object files built in the source directories (it will be the default in automake 2.0, and you get a warning error if you don't do so in 1.14).

This change means that if you build in build_posix (as I do), you get a tree under build_posix that mirrors the source tree:

```
src/support
src/support/.deps
src/support/.deps/.dirstamp
src/support/.deps/cksum.Plo
src/support/.deps/err.Plo
src/support/.deps/filename.Plo
...
src/support/.deps/stat.Plo
src/support/.dirstamp
src/support/.libs
src/support/.libs/cksum.o
src/support/.libs/err.o
src/support/.libs/filename.o
...
src/support/cksum.lo
src/support/cksum.o
src/support/err.lo
src/support/err.o
src/support/filename.lo
src/support/filename.o
```

If you build in the top-level directory (as some of you do?), you get those files in the source tree itself, alongside the C language source files.

I don't think we care where people downloading our distributions build their files, but this might be a problem for us, if we want to work in trees where we build in the top-level, suddenly the source directories have a lot more stuff.

I didn't get Java to build, but I think everything else is working.  There's some magic in the Java build I didn't figure out, specifically, `$(JAVASRC)` isn't working with automake 1.14.   I had to make a change in test/format to not use `$(top_srcdir)` to find a source file (see 6d8c107), and I suspect a similar change is going to be necessary for Java.