Fetching tarball before the build

I just rebased one of my upstream child work spaces to milestone 77 (DEV300_m77), and noticed my build breaking all over the place due to missing patches for external libraries. After some digging, here is the step I was missing.

./fetch_tarballs.sh ooo.lst

which apparently downloads a whole bunch of external source packages from http://hg.services.openoffice.org/binaries that the build depends on, and places them into their respective location within the source tree. After this was done, my build proceeded normally.