pkg/48840: www/firefox does not build on Darwin

[pho%netbsd.org@localhost]

>Number:         48840
>Category:       pkg
>Synopsis:       www/firefox does not build on Darwin
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 28 03:05:00 +0000 2014
>Originator:     PHO
>Release:        current
>Organization:
TNF
>Environment:
Darwin aria.cielonegro.org 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 
16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC Power Macintosh
>Description:
www/firefox does not build on Darwin, mostly because there are so many places 
in the codebase wrongly assuming Cocoa toolkit whenever the OS is Darwin. The 
package is meant to use cairo-gtk2 backend. Building Cocoa application (i.e. 
/Applications/Firefox.app) is clearly not what we want.

The Mozilla Foundation stopped supporting old MacOS X, especially those which 
run on PowerPC. The codebase still has PowerPC support but some of them are 
bitrotted or incomplete.

I have currently a bunch of patches and a seemingly working binary, but these 
patches still need to be sorted out.
>How-To-Repeat:
Try to build www/firefox on any Darwin box.
>Fix: