don't version mkdepend.exe; it doesn't need it, and it breaks, since

build_number is not built when mkdepend is built. r=cls, a=asa

config/mkdepend/Makefile.in

@@ -26,6 +26,9 @@ VPATH		= @srcdir@
 
 include $(DEPTH)/config/autoconf.mk
 
+# unset the official macros so that mkdepened doesn't try to get versioned
+MOZILLA_OFFICIAL=
+BUILD_OFFICIAL=
 MODULE		= mkdepend
 PROGRAM		= mkdepend$(BIN_SUFFIX)
 ifdef GNU_CC