removing generated gen_ndr files from git master

[tridge at samba.org]

Nobody seemed to object to the removal of the gen_ndr files from git,
so I've put together a patch that does that. Apart from removing lots
of files, it also fixes the source3/ build to auto-build the IDL files
when you type make.

This involved two changes:

 1) a dependency on samba3-idl in the all Makefile target

 2) fixing the build_idl.sh scripts (2 of them!) to look for the
 correct set of output files when deciding if a pidl run was needed

The changes are in my nogenerated branch at:

  git://git.samba.org/tridge/samba.git

please try it. I'll also ask a few people in the hacking room at
SambaXP to try it, and if there doesn't appear to be any problems I'll
push to master later today.

Cheers, Tridge