CI: Test static build on installed glib

gio/tests/static-link/app.c

@@ -0,0 +1,8 @@
+#include <gio/gio.h>
+
+int main(int argc, char *argv[])
+{
+  GApplication *app = g_application_new (NULL, 0);
+  g_object_unref (app);
+  return 0;
+}

gio/tests/static-link/meson.build

@@ -0,0 +1,8 @@
+project('test-static-link', 'c')
+
+# This is a dummy project that static links against installed gio.
+# See gio/tests/static-link.py.
+app = executable('test-static-link', 'app.c',
+  dependencies : dependency('gio-2.0', static : true)
+)
+test('test-static-link', app)