Add libsass error output for issue 2155
Add libsass error output for issue 2155

sass/sass-spec,nschonni/sass-spec,sass/sass-spec,nschonni/sass-spec,xzyfer/sass-spec,xzyfer/sass-spec,xzyfer/sass-spec,mgreter/sass-spec,sass/sass-spec,mgreter/sass-spec,mgreter/sass-spec,nschonni/sass-spec,sass/sass-spec,xzyfer/sass-spec,nschonni/sass-spec