update to PCRE 8.36

git-svn-id: https://svn.r-project.org/R/trunk@66968 00db46b3-68df-0310-9c12-caf00c1e9a41
typo

git-svn-id: https://svn.r-project.org/R/trunk@66969 00db46b3-68df-0310-9c12-caf00c1e9a41