* Separate the featurebase and fbsql make build targets
Using the same build target was problematic because they shared the same
flags. Since the `-o` output flag was used, the fbsql binary was
overwriting the featurebase binary.
* make sure the make package target builds fbsql
we want to be sure we delete the files we created during the
run even if the test run panics, but not files other runs
may have created also in /mnt/ramdisk.
So, we were special-casing creating a ramdisk, and setting a special
environment variable for it, for boltdb translate files, to improve
performance.
But actually, etcd and test cluster data and so on all go in $TMPDIR,
and if you move all of those also into a ram disk, you get way better
performance. But 2GB may not be enough for that.
So!
We unify on $TMPDIR, we bump the default size to 4GB, we make the
size configurable, and we stop using the name RAMDISK. This should
improve performance on MacOS significantly for `make test` and
things like it, and also simplifies our lives by not having a special
case for the boltdb translate files.
Also change the environment variable names used in our CI config.
(I don't see where we mount the ramdisks, but I think that's happening
in our setup.)
