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>
Thanks. I'm build libgmp and add it to omnibus-software, because it speedup some math operations.
Also as i see my ruby compiled with this lib, but omnibus-software have without-gmp. So ruby ignored it when compiled...
But ok. I'm add it.