Revert "remove package 'libelf'"

This reverts commit ca5e59d6f6ae1be8490688a47646028549736517.
Revert "elfutils: remove package"

This reverts commit 12bf1cfe1476bc5aeebe8fe85465e718780968a3.
elfutils: build for target, fix build

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Revert "Revert "remove package 'libelf'""

This reverts commit 95fc06c22cc2e36b31234e3fcb8d1ad6c9843fab.
elfutils: add install script

Signed-off-by: Stephan Raue <stephan@openelec.tv>
linux: perf depends on elfutils and Python

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv