build problems

[John W. Eaton]

On  4-Aug-2012, John W. Eaton wrote:

| I started to fix some build problems I noticed but I'm out of time.
| If you want to look at them, I'm attaching my current patch.  It might
| not not be complete.  I'm still waiting for it to compile, but I have
| to go now.
| 
| The problem I was trying to solve was that without the convenience
| libraries in the subdirectories, the subdirectories were not being
| created, and commands to generate files in those directories was then
| failing for me when doing an out of source tree build.

The following changes appear to fix the build problems for me.  I've
merged them to the gui and classdef branches.

http://hg.savannah.gnu.org/hgweb/octave/rev/03381a36f70d

jwe