D5955: Fix compilation on CentOS 6

[Kevin Funk]

kfunk added a comment.


  Alright, I now see why this is no longer required under Linux: https://stackoverflow.com/a/32649327/592636
  
  > Since glibc 2.17, the library linking -rt is no longer required.
  >  The clock_* are now part of the main C library. You can see the change history of glibc 2.17 where this change was done explains the reason for this change:

REPOSITORY
  R111 KSysguard Library

REVISION DETAIL
  https://phabricator.kde.org/D5955

To: kfunk, jriddell
Cc: plasma-devel, ZrenBot, spstarr, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart, lukas
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