build: various improvements

- add option to install only host tools
- add option to specify lib and runtime dir

Type: improvement

Change-Id: I6356b52df459120fc9b0127948bae7679fb10e52
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vpp-api/vapi/CMakeLists.txt b/src/vpp-api/vapi/CMakeLists.txt
index 4c74ae8..04e7edd 100644
--- a/src/vpp-api/vapi/CMakeLists.txt
+++ b/src/vpp-api/vapi/CMakeLists.txt
@@ -55,6 +55,6 @@
   vapi_cpp_gen.py
   vapi_json_parser.py
 
-  DESTINATION bin
+  DESTINATION ${VPP_RUNTIME_DIR}
   COMPONENT vpp-dev
 )