ruby: update to 2.1.5

Ruby 2.1.5 has been released.

This release includes a security fix for a DoS vulnerability of REXML.
It is similar to the fixed vulnerability in the previous release, but
new and different from it.

CVE-2014-8090: Another Denial of Service XML Expansion
And, some bug fixes are also included. See tickets and ChangeLog for details.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Merge pull request #659 from luizluca/ruby-update

ruby: update to 2.1.5
elfutils: imported from oldpackages, updated to 0.160

elfutils is needed by ltrace. The pkg was imported from oldpackages.
It was updated to latest version, requiring some fixes in patches.

I added myself as maintainer.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
ltrace: add new package at version 0.7.3

ltrace intercepts and records dynamic library calls which are called
by an executed process and the signals received by that process.
It can also intercept and print the system calls executed by the program.
ltrace was originally authored by Juan Cespedes.

It is to library calls what strace is for syscalls.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>