Move a compiled WKContentRuleList to its destination before calling mmap
Created attachment 326971 [details] Patch
See https://bugs.webkit.org/show_bug.cgi?id=179695 and https://build.webkit.org/results/Apple%20High%20Sierra%20Release%20WK2%20(Tests)/r224865%20(1163)/http/tests/contentextensions/subresource-redirect-blocked-stderr.txt
http://trac.webkit.org/r224885
<rdar://problem/35566939>
http://trac.webkit.org/r224900