Create ability to install into dest_dir when building

Sometimes install_dir not writeable or sandboxed, in this case
we can emulate DESTIR makefile behaviour

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
You have to remote this, the purpose of omnibus is to catch deps like that.  Either you need to remove libgmp headers before you compille, or you need to submit a patch to add some --without-gmp flag to whatever is finding it and linking against it.