Fix building with glibc-2.16

[Xarthisius]

Due to yet another change in header files made by glibc's maintainers <sys/resource.h> is required in couple of places.
For build failure with slurm-2.3.4 please see: http://tinyurl.com/c5fuvsg
Downstream bug report: https://bugs.gentoo.org/show_bug.cgi?id=430252

[dannyauble]

This patch doesn't appear to modify anything in src/common/jobacct_common.c (which doesn't exist anymore -> src/common/slurm_jobacct_gather.c) Not sure how this could fix the build error. It appears adding a #include <sys/wait.h> should fix this build error though. Can you please verify this issue with 2.4 or 2.5?

There will be no more 2.3 releases so if this does fix the issue it will need to be a local patch.

I don't currently have any systems with glibc 2.16 on them or I would.

[Xarthisius]

This PR fixes failures with glibc-2.16 and git HEAD. For 2.3.4 I've created separate patch and applied it on distro level[1].
Here's the build log for head: https://gist.github.com/3495957
Information about the system I've used: https://gist.github.com/3495960

[1] http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-cluster/slurm/files/slurm-2.3.4-glibc2.16.patch?revision=1.1&view=markup

[dannyauble]

Thanks for the explanation. I back-ported this to 2.4 (0fad6f5) and merged that into 2.5 outside of this request.