build: export vapi generation in vpp-dev

Adds the higher-level vapi generation to cmake/api.cmake and exposes
the necessary python scripts in vpp-dev, so that out-of-tree/downstream
plugins can also leverage the more convenient API.

Type: feature

Signed-off-by: Oliver Giles <oliver_g@radwin.com>
Change-Id: I8c40a14d27ba3cb972c6907632e03c0e7b0ce982
diff --git a/src/cmake/library.cmake b/src/cmake/library.cmake
index fd6c077..dc14ae5 100644
--- a/src/cmake/library.cmake
+++ b/src/cmake/library.cmake
@@ -43,7 +43,7 @@
   endif()
 
   if(ARG_API_FILES)
-    vpp_add_api_files(${lib} ${ARG_API_FILES})
+    vpp_add_api_files(${lib} core vpp ${ARG_API_FILES})
     foreach(file ${ARG_API_FILES})
       get_filename_component(dir ${file} DIRECTORY)
       install(