Noisy build in Mavericks native 1.8.7 MRI: rdoc warnings

[dayglojesus]

crypto.c is throwing some warnings about rdco during build

Need to clean this up.

bash-3.2# sudo gem update macadmin
Updating installed gems
Updating macadmin
Fetching: macadmin-0.0.6.gem (100%)
Building native extensions.  This could take a while...
Successfully installed macadmin-0.0.6
Installing RDoc documentation for macadmin-0.0.6

No definition for salted_sha512_pbkdf2_from_string
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rdoc/rdoc.rb:280: warning: conflicting chdir during another chdir block
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rdoc/rdoc.rb:287: warning: conflicting chdir during another chdir block
Installing ri documentation for macadmin-0.0.6

No definition for salted_sha512_pbkdf2_from_string
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rdoc/rdoc.rb:280: warning: conflicting chdir during another chdir block
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rdoc/rdoc.rb:287: warning: conflicting chdir during another chdir block
ERROR:  While generating documentation for macadmin-0.0.6
... MESSAGE:   Unhandled special: Special: type=33, text="crypto.c"
... RDOC args: --ri --op /Library/Ruby/Gems/1.8/doc/macadmin-0.0.6/ri --quiet lib ext --title macadmin-0.0.6 Documentation
(continuing with the rest of the installation)
Done installing documentation for macadmin after 2 seconds
Gems updated: macadmin