do just-in-time loading of Carp.pm in some modules

do just-in-time loading of Carp.pm in some modules
Subject: [PATCH] No Carp #4 AutoSplit.pm
Subject: [PATCH] no Carp #5 (File::Path)
Subject: [PATCH] no Carp #7 - charnames.pm
Subject: [PATCH] no Carp #6 (File::Compare, File::Copy, File::Temp)
Subject: [PATCH] no Carp #8 - SelfLoader, Text/Balanced and open.pm

p4raw-id: //depot/perl@25052