postgresql: enable some bindings

1. Enable pam, openssl, python, uuid, libxml, tcl, nls, libxml and perl bindings.
2. Make plperl, plpython, pltcl subpackages as dynamic in case other packages runtime
depend on them.

Signed-off-by: Chong Lu <Chong.Lu@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>