This reverts commit 6b0292e12614.

handle_binary() is needed for preparing PIE header during compilation.
If we need to provide API for building another compel binary, probably
it should be a separate library from libcompel.{a,so}

IOW, there is no sense to have handle_binary() included into CRIU.
For CRIU it's needed only during the build to generate parasite header.

Move handle_elf() to compel binary from library, as it was previously
corrected in commit 64bb75a8 ("compel: Drop off handle-elf routines
from library").
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>