Port bug 756382 (bustage fix for --enable-xterm-updates builds) rs=Callek

config/rules.mk

@@ -389,8 +389,8 @@ XPIDL_GEN_DIR		= _xpidlgen
 ifdef MOZ_UPDATE_XTERM
 # Its good not to have a newline at the end of the titlebar string because it
 # makes the make -s output easier to read.  Echo -n does not work on all
-# platforms, but we can trick sed into doing it.
-UPDATE_TITLE = sed -e "s!Y!$(1) in $(shell $(BUILD_TOOLS)/print-depth-path.sh)/$(2)!" $(MOZILLA_DIR)/config/xterm.str;
+# platforms, but we can trick printf into doing it.
+UPDATE_TITLE = printf "\033]0;%s in %s\007" $(1) $(shell $(BUILD_TOOLS)/print-depth-path.sh)/$(2) ;
 endif
 
 define SUBMAKE # $(call SUBMAKE,target,directory)