THRIFT-2685 c_glib: Include in integration test suite

- client side

Patch: Simon South
diff --git a/configure.ac b/configure.ac
index d97e957..15aedf7 100755
--- a/configure.ac
+++ b/configure.ac
@@ -653,6 +653,7 @@
   lib/rb/Makefile
   lib/lua/Makefile
   test/Makefile
+  test/c_glib/Makefile
   test/cpp/Makefile
   test/erl/Makefile
   test/go/Makefile