Add C++ models to make install target
Add C++ models to make install target

Summary:
C++ header models were not included into make install target. This made
C++ analysis much worse for infer released using 'make install'

Reviewed By: jvillard

Differential Revision: D3463000

fbshipit-source-id: 6f7e9b9

jvillard/infer,kageiit/infer,blzq/infer,ryoon/infer,jvillard/infer,ropas/infer,facebook/infer,facebook/infer,xennygrimmato/infer,kageiit/infer,ryoon/infer,jsachs/infer,ryoon/infer,blzq/infer,xennygrimmato/infer,facebook/infer,xennygrimmato/infer,jsachs/infer,blzq/infer,jvillard/infer,jvillard/infer,xennygrimmato/infer,kageiit/infer,blzq/infer,jsachs/infer,ryoon/infer,jsachs/infer,ropas/infer,kageiit/infer,kageiit/infer,blzq/infer,xennygrimmato/infer,ryoon/infer,ropas/infer,jvillard/infer,xennygrimmato/infer,jvillard/infer,ropas/infer,facebook/infer,ropas/infer,jvillard/infer,ropas/infer,kageiit/infer,facebook/infer,jsachs/infer,facebook/infer,blzq/infer,kageiit/infer,facebook/infer,xennygrimmato/infer,ryoon/infer,jsachs/infer