Added libCsup as a mysql library dependency on hpux11.

This means any projects statically linking to our libraries using the HPUX11 compiler will need to add the -lCSup option to their build link options. If they use the mysql_config tool this will happen automatically.

Projects that dynamically link to libmysqlclient will continue to work without any modifications.

Library libCsup is a C++ runtime library needed for yassl support when built with the hpux11 C/C++ compiler. The first attempts to fix this bug were to remove the yassl dependencies on libCsup. We tried removing all pure virtual functions and other hacks, but the dependency remained. The only other options left involve extensive restructuring of the yassl library.