Remove redundant building of httpd from buildxen.sh

This is now done in main Makefile.

Signed-off-by: Martin Lucina <martin@lucina.net>
app-tools: Remove useless objcopy from stunt ld

Discussed with Ian previously; the objcopy step was left over from
previous attempts at namespacing mini-os and is no longer required as
this is performed when linking minios.o.

Signed-off-by: Martin Lucina <martin@lucina.net>