WIP: altera pcie wrapper

This is a work-in-progress to wrap altera pcie endpoint. The PcieEndpointS5.sv is not finished yet.

Changes I made in this request does not affect other part of the code base. 
In combination of line 388, this removes the following warning.

Warning: Command line: (S0073)
  Duplicate directories were found in the path specified with the -p flag.
  Only the first occurrence will be used. The duplicates are:
    /home/hwang/connectal/bsv