Add code to define XPIDL_JS_STUBS if it is defined in the environment for alecf.

config/config.mak

@@ -58,6 +58,10 @@ LCFLAGS=$(LCFLAGS) -DSTAND_ALONE_JAVA
 MOZ_OJI = 1             # on by default now
 !endif
 
+!ifdef XPIDL_JS_STUBS
+LCFLAGS=$(LCFLAGS) -DXPIDL_JS_STUBS
+!endif
+
 !ifdef MOZ_LIBTEST
 MOZ_LIBTEST = 1
 LCFLAGS=$(LCFLAGS) -DLAYPROBE_API