As indicated in #5574 samba fails to build with linker error due to lack
of talloc_* functions when the packet libtalloc also gets build.
According to Makefile it is compiled with "--without-libtalloc" option.
Running ./configure --help shows that there is another option connected
to libtalloc: --enable/disable-external-libtalloc.
Adding this option fixes build.
Signed-off-by: Jakub Tymejczyk <jakub@tymejczyk.pl>
316eb26a3a