tweak building of libcxx to work around windows failure

system/lib/libcxx/Makefile

@@ -1,4 +1,5 @@
 OBJECTS = \
+  locale.bc \
   algorithm.bc \
   condition_variable.bc \
   future.bc \
@@ -19,7 +20,6 @@ OBJECTS = \
   chrono.bc \
   exception.bc \
   ios.bc \
-  locale.bc \
   regex.bc \
   strstream.bc \
   typeinfo.bc