Lua examples now run during 'make check' and makefile tidyup.

Examples/lua/embed3/Makefile

@@ -1,20 +1,21 @@
 TOP        = ../..
 SWIG       = $(TOP)/../preinst-swig
 TARGET     = embed3
-SRCS      = example.cpp
+SRCS       = example.cpp
 INTERFACE  = example.i
 LUA_INTERP = embed3.cpp
 
 # this is a little different to normal as we have our own special interpreter
 # which we want to static link
 # we also need the external runtime, so we can get access to certain internals of SWIG
-all::
+check: build
+	$(MAKE) -f $(TOP)/Makefile TARGET='$(TARGET)' lua_embed_run
+
+build:
 	$(SWIG) -c++ -lua $(SWIGOPT) -external-runtime swigluarun.h
 	$(MAKE) -f $(TOP)/Makefile $(SWIGLIB) SRCS='$(SRCS)' SWIG='$(SWIG)' \
 	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='example.i' LUA_INTERP='$(LUA_INTERP)' lua_static_cpp
 
-clean::
+clean:
 	$(MAKE) -f $(TOP)/Makefile lua_clean
-
-check: all
-
+	rm -f swigluarun.h $(TARGET)