[oe] meta-toolchain continues to woe

[Graham Gower]

Chris,
The patch you submitted prints out an error from the lockf() function
call. Which is fine, but its more common for the creat() call to fail
before hand, meaning that the lockf() function would have be passed -1
as the file descriptor.

I made a small change to hopefully improve this.
http://code.google.com/p/opkg/source/detail?r=288

-Graham