removed "--defined" option from nm in gen-version-script.sh replaced functionality with grep

[David Bremner]

On Tue, 30 Aug 2011 14:46:14 +0200, Matthias Guedemann <matthias.guedemann at googlemail.com> wrote:

> -nm --defined $* | awk '$3 ~ "Xapian.*Error" {print $3}' | sort | uniq | \
> +nm $* | grep "^[0-f][0-f]*" | awk '$3 ~ "Xapian.*Error" {print $3}' |
> sort | un

As mentioned in the other thread, I pushed a modified version of
this. Just for the archives, patches for notmuch need a bit more
discussion in the commit message than the one line summary.

David