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

Examples/lua/embed/Makefile

@@ -1,18 +1,19 @@
 TOP        = ../..
 SWIG       = $(TOP)/../preinst-swig
 TARGET     = embed
-SRCS      = example.c
+SRCS       = example.c
 INTERFACE  = example.i
 LUA_INTERP = embed.c
 
 # this is a little different to normal as we have our own special interpreter
 # which we want to static link
-all::
+check: build
+	$(MAKE) -f $(TOP)/Makefile TARGET='$(TARGET)' lua_embed_run
+
+build:
 	$(MAKE) -f $(TOP)/Makefile $(SWIGLIB) SRCS='$(SRCS)' SWIG='$(SWIG)' \
 	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='example.i' LUA_INTERP='$(LUA_INTERP)' lua_static
 
-clean::
+clean:
 	$(MAKE) -f $(TOP)/Makefile lua_clean
-
-check: all
-
+	rm -f $(TARGET)