Update files for perl-5.18.2-RC1
Update the pre_build_unicore patch for 5.18.2
Add a perl-5.18.2-RC1 build log

Seems ok.
make rm faster under find with \+
Add more notes on UPDATING
Roll to perl-5.18.2
Update patches that need it
This belongs in dont_build_unicore.patch
Successful build log for amd64