make modules work again under linux

modules/ipc/daemon/Makefile.in

@@ -73,11 +73,16 @@ LIBS		= \
         $(DIST)/lib/$(LIB_PREFIX)ipccom_s.$(LIB_SUFFIX) \
 		$(NULL)
 
+# XXX -rdynamic is probably good for lots of other platforms
+ifeq ($(OS_ARCH),Linux)
+LIBS += -rdynamic
+endif
+
 include $(topsrcdir)/config/rules.mk
 
 DEFINES += -DIPC_DAEMON
 
-ifeq ($(MOZ_WIDGET_TOOLKIT),windows)
+ifeq ($(OS_ARCH),WINNT)
 #
 # need to install mozipcd.lib, which contains the symbols exported by the
 # daemon that modules will need to import.