s4:heimdal_build: changes required to build after import

s4:heimdal_build: changes required to build after import

For libtommath we do this by using the list from makefile.commo
in in libtommath rather than trying to match the list by hand.

This will be easier to maintain over the long term.

Thanks to work over many years by:
 - Gary Lockyer <gary@catalyst.net.nz>
 - Stefan Metzmacher <metze@samba.org>
 - Andrew Bartlett <abartlet@samba.org>

NOTE: THIS COMMIT WON'T COMPILE/WORK ON ITS OWN!

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>