Convert files in .nib format to .xib format

Convert files in .nib format to .xib format.

Committed: http://code.google.com/p/google-breakpad/source/detail?r=609

[Mark Mentovai]

We need to do this for Chrome to ensure identical output when the build is
performed on 10.5 and 10.6.

The .xib format is understood by Interface Builder 3, which shipped with Xcode
3, which requires 10.5. It still produces .nib output compatible with 10.4 (or
earlier) but it means that the build environment requires 10.5.

I don’t think this will be a problem for Breakpad. I think all builds anyone
cares about these days are done on 10.5 (or even 10.6) but target 10.4 with the
SDK.

[mochalatte]

LGTM