[A-178] slapt-get 0.10.2d and gslapt 0.5.3 released

slapt-get 0.10.2d features the following changes:

* gpgme now requires gpgme_check_version () for initialization
* define _FILE_OFFSET_BITS prior to including gpgme.h as required by gpgme in -current
* incorporated a modified version of the patch submitted by Vitaly Chernookiy for making slapt-get cross compile friendly
* removed extraneous / when constructing package source url