Exchange order of ISO_C_CLOCK_BASED_CLOCK_PROCESS_CPUTIME_ID and
POSIX_TIMES_BASED_CLOCK_PROCESS_CPUTIME_ID.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42648 b2dd03c8-39d4-4d8f-98ff-823fe69b080e