build: include v8-fast-api-calls.h in bundle

This API is still experimental, but it's not really possible to
experiment with it without this header.

Author: zbjornson

tools/install.py

@@ -188,6 +188,7 @@ def wanted_v8_headers(files_arg, dest):
       'deps/v8/include/v8-exception.h',
       'deps/v8/include/v8-extension.h',
       'deps/v8/include/v8-external.h',
+      'deps/v8/include/v8-fast-api-calls.h',
       'deps/v8/include/v8-forward.h',
       'deps/v8/include/v8-function-callback.h',
       'deps/v8/include/v8-function.h',