spa: Add a varlink client support library

spa/tests/meson.build

@@ -27,6 +27,17 @@ if find.found()
   endforeach
 endif
 
+utils = [
+  ['varlink-call', []],
+]
+
+foreach a : utils
+  executable('spa-' + a[0], a[0] + '.c',
+    dependencies : [ spa_dep, dl_lib, pthread_lib, mathlib ] + a[1],
+    include_directories : [configinc],
+  )
+endforeach
+
 benchmark_apps = [
   ['stress-ringbuffer', []],
   ['benchmark-pod', []],