gdc: statically built in libphobos library makes dynamic binaries big

[Matthias 'Maddi' Kopfermann <matthias@kopfermann.org>]

Hi, gcc maintainers,

thanks a lot for doing a debian package for gdc [ d compiler ].
today i found out that the main libgphobos library is built into
every compiled program which makes even the smallest "hello
world" printing program ~150kb big at my i386 computer because libphobos is
statically built into the compiled program.

d is very beautiful [ IMO ]  but it's a pity to always have
big dynamically compiled programs that way.

i found this link how to dynamically have a libgphobos
library: 
http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=43626

Perhaps this could be adapted for the debian gdc package or
as an option for a specific debian package for gdc?

                greetings and thx a lot for the debian
                package,
                                Maddi

           PS: tested with debian unstable