libsass is not compiled correctly by node-waf

[andrew]

When compiling the cpp extension using node-waf, it appears that libsass is not being correctly built.

$ node-waf configure && node-waf build
$ node
> var sass = require('./sass');
{ render: [Function] }
>  sass.render('scss string')
dyld: lazy symbol binding failed: Symbol not found: _sass_new_context
  Referenced from: /Users/andrew/code/node-sass/build/Release/sass.node
  Expected in: flat namespace

dyld: Symbol not found: _sass_new_context
  Referenced from: /Users/andrew/code/node-sass/build/Release/sass.node
  Expected in: flat namespace

Trace/BPT trap: 5

@hcatlin has a combined makefile for his sassc project that does a similar thing: https://github.com/hcatlin/sassc/blob/master/Makefile

[jedi4ever]

try LD_LBRARY_PATH='to where the lib lives' node