False positive perl leftovers

[Ade Lovett]

For the longest time, I've noticed a number of issues with false- 
positive leftovers relating to /usr/bin/perl and /usr/bin/perl5 being  
"missing" as part of the mtree check after a single package build.

I'm not sure what the underlying cause is yet -- possibly some weird  
interaction between tinderbox's removal of packages, and the use.perl  
script that's part of the perl port.

In the interests of my own sanity, I added the following as line 169  
of lib/buildscript:

/bin/rm -f /usr/bin/perl /usr/bin/perl5   # XXX: ugly hack to fix  
false positives

Wondering if this should be included in the actual code itself, rather  
than being a local hack -- I've reproduced it on a variety of  
hardware, package builds, architectures, and OS versions, so I'm  
pretty such it's not specific to me.

-aDe