--enable-darwin-64bit makes PPC Leopard build unhappy

[natevw]

In order to compile Couch on a 32-bit Leopard PowerPC machine, it is necessary to comment out the line in tasks/erlang.rake that reads: configure.push '--enable-darwin-64bit' if DISTRO[0] == :osx

[jhs]

Thanks for all the bug reports. I am not ignoring you, just trying to find a PPC mac! I'll correct and close these bugs then.