THRIFT-3592 Add basic test client

This closes #830
diff --git a/test/Makefile.am b/test/Makefile.am
index 6db171f..4abb0fd 100755
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -75,6 +75,11 @@
 PRECROSS_TARGET += precross-erl
 endif
 
+if WITH_LUA
+SUBDIRS += lua
+PRECROSS_TARGET += precross-lua
+endif
+
 #
 # generate html for ThriftTest.thrift
 #