fedora package

Hi,

As part of the effort to enable perf+coresight on fedora+RHEL, I am packaging up opencsd on fedora. This will make me the package maintainer there. As part of that work there were a couple minor tweaks to the install stanza in the makefile, as well as a couple gcc10 related warning cleanups I will forward here RSN too.

If anyone is running fedora the early test packages are here:

https://copr.fedorainfracloud.org/coprs/jlinton/opencsd/build/1519164/ or https://koji.fedoraproject.org/koji/taskinfo?taskID=46715425 and the in progress install tweak https://github.com/Linaro/OpenCSD/pull/26

Thanks,