[PATCH] Use base-machine in abilist tuple.

[Roland McGrath]

The libc-abis stuff is using $(base-machine), so it would be consistent
with that.  But let's consolidate directly.  Add a variable 

abi-config = $(base-machine)-$(config-vendor)-$(config-os)

and make both the libc-abis.stamp target and check-abi-config use that.

That said, I think we really ought to move on quickly to the cleanup
dropping the merging stuff and putting the data into sysdeps/ dirs.


Thanks,
Roland