Hi Lin,
I am sorry, but the package in the current state is nowhere near to be released in the Debian.
The upstream tarball includes two upstream libraries. That might be okayish for releasing just the client, but when you package other binaries (the server) which will link to the same library, you want to use shared libraries. Also this makes the packaging unnecessarily complex.
But you certainly cannot embed libjson-glib-1.0 as part of libsearpc (under different name), that's just security nightmare
I will create the initial packaging in correct way (I already have libsearpc 1.1.0+dfsg, e.g. without embedded json-glib, packaged), and make you the co-maintainer of the packages.
Ondrej