Bug 684096 - "The webconsole should display column numbers in addition to line numbers". c=mdibaiee
Bug 1093718 - Turn off minification of Fennec JS in Nightly. r=mfinkle

In b2g/installer/Makefile.in, minification is conditional on not being a
debug build.  Seems reasonable to have minified and non-minified builds
regardless of release channel, so I've copied that here.