Log Message:
Update to libassuan-1.0.5.  As shipped, it builds with -fPIC on linux.
This is not acceptable for us.  Instead, we patch to use libtool.
The included test passes.

Changes since 1.0.3:

 * Minor fixes.
 * Build library for GNU/Linux as PIC [**but we use libtool**]
 * New hook feature to enhance the internal I/O functions.