gnu: Add jsonrpc-glib.

* gnu/packages/gnome.scm: (jsonrpc-glib) New variable.

gnu/packages/gnome.scm

@@ -9958,3 +9958,33 @@ (define-public parlatype
 environment.  Its main purpose is the manual transcription of spoken
 audio files.")
       (license license:gpl3+))))
+
+(define-public jsonrpc-glib
+  (package
+    (name "jsonrpc-glib")
+    (version "3.34.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://gnome/sources/" name "/"
+                                  (version-major+minor version) "/"
+                                   name "-" version ".tar.xz"))
+              (sha256
+               (base32
+                "0j05x4xv2cp3cbmp30m68z8g4rdw7b030ip4wszyfj9ya15v5kni"))))
+    (build-system meson-build-system)
+    (inputs
+     `(("json-glib" ,json-glib)
+       ("glib" ,glib)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)
+       ("glib:bin" ,glib "bin") ; for glib-genmarshal, etc.
+       ("gobject-introspection" ,gobject-introspection)
+       ("vala" ,vala)))
+    (home-page "https://gitlab.gnome.org/GNOME/jsonrpc-glib")
+    (synopsis "JSON-RPC library for GLib")
+    (description "Jsonrpc-GLib is a library to communicate with JSON-RPC based
+peers in either a synchronous or asynchronous fashion.  It also allows
+communicating using the GVariant serialization format instead of JSON when
+both peers support it.  You might want that when communicating on a single
+host to avoid parser overhead and memory-allocator fragmentation.")
+    (license license:lgpl2.1+)))