vppapigen: Fix missing api dir
vppapigen: Fix missing api dir

Type: fix

pci_types.api lives in vlib/pci which wasn't included
in the generate_json.py script

Change-Id: I15649786282584b7aefb9ace83c5154eb697b50b
Signed-off-by: Nathan Skrzypczak <0fa918c439baf617eab84c5ae2a48ee9db643966@gmail.com>

chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp