Override always 'CARGO_HOME' env variable.
Override always 'CARGO_HOME' env variable.

This use always `cargo-home-dir` in `/.servobuild`
even if you set `CARGO_HOME` in your shell.

If you use [racer][racer] with [rustup (multirust.rs)][rustup],
you may set `CARGO_HOME` env variable.
Then the previous code would be a problem which does not use
`cargo-home-dir` in `/.servobuild`.

[racer]: https://github.com/phildawes/racer
[rustup]: https://github.com/rust-lang-nursery/rustup.rs

anthgur/servo,peterjoel/servo,upsuper/servo,splav/servo,fiji-flo/servo,nnethercote/servo,szeged/servo,DominoTree/servo,KiChjang/servo,nnethercote/servo,rnestler/servo,notriddle/servo,anthgur/servo,splav/servo,anthgur/servo,pyfisch/servo,KiChjang/servo,cbrewster/servo,ConnorGBrewster/servo,cbrewster/servo,fiji-flo/servo,eddyb/servo,dati91/servo,notriddle/servo,dsandeephegde/servo,upsuper/servo,szeged/servo,mbrubeck/servo,upsuper/servo,eddyb/servo,ConnorGBrewster/servo,canaltinova/servo,sadmansk/servo,rnestler/servo,saneyuki/servo,notriddle/servo,DominoTree/servo,emilio/servo,upsuper/servo,jimberlage/servo,splav/servo,KiChjang/servo,nnethercote/servo,rnestler/servo,ConnorGBrewster/servo,avadacatavra/servo,emilio/servo,avadacatavra/servo,dati91/servo,mbrubeck/servo,CJ8664/servo,dati91/servo,dati91/servo,paulrouget/servo,cbrewster/servo,larsbergstrom/servo,sadmansk/servo,ConnorGBrewster/servo,notriddle/servo,canaltinova/servo,eddyb/servo,mattnenterprise/servo,jimberlage/servo,larsbergstrom/servo,cbrewster/servo,emilio/servo,fiji-flo/servo,SimonSapin/servo,SimonSapin/servo,nrc/servo,pyfisch/servo,nnethercote/servo,SimonSapin/servo,nrc/servo,peterjoel/servo,nnethercote/servo,SimonSapin/servo,paulrouget/servo,nnethercote/servo,thiagopnts/servo,jimberlage/servo,anthgur/servo,notriddle/servo,larsbergstrom/servo,anthgur/servo,saneyuki/servo,notriddle/servo,eddyb/servo,splav/servo,rnestler/servo,nrc/servo,paulrouget/servo,emilio/servo,sadmansk/servo,peterjoel/servo,CJ8664/servo,eddyb/servo,dsandeephegde/servo,thiagopnts/servo,ConnorGBrewster/servo,thiagopnts/servo,splav/servo,avadacatavra/servo,mbrubeck/servo,nrc/servo,canaltinova/servo,nrc/servo,splav/servo,mattnenterprise/servo,notriddle/servo,DominoTree/servo,splav/servo,thiagopnts/servo,jimberlage/servo,paulrouget/servo,splav/servo,peterjoel/servo,KiChjang/servo,upsuper/servo,fiji-flo/servo,szeged/servo,pyfisch/servo,mattnenterprise/servo,sadmansk/servo,sadmansk/servo,nrc/servo,nnethercote/servo,avadacatavra/servo,cbrewster/servo,fiji-flo/servo,larsbergstrom/servo,pyfisch/servo,mattnenterprise/servo,larsbergstrom/servo,avadacatavra/servo,nnethercote/servo,rnestler/servo,paulrouget/servo,szeged/servo,upsuper/servo,canaltinova/servo,SimonSapin/servo,pyfisch/servo,szeged/servo,dati91/servo,KiChjang/servo,thiagopnts/servo,thiagopnts/servo,KiChjang/servo,notriddle/servo,rnestler/servo,DominoTree/servo,DominoTree/servo,DominoTree/servo,mbrubeck/servo,pyfisch/servo,mbrubeck/servo,cbrewster/servo,mattnenterprise/servo,emilio/servo,canaltinova/servo,KiChjang/servo,avadacatavra/servo,peterjoel/servo,paulrouget/servo,splav/servo,CJ8664/servo,DominoTree/servo,ConnorGBrewster/servo,szeged/servo,saneyuki/servo,notriddle/servo,paulrouget/servo,pyfisch/servo,saneyuki/servo,CJ8664/servo,nrc/servo,dsandeephegde/servo,mbrubeck/servo,canaltinova/servo,dsandeephegde/servo,larsbergstrom/servo,szeged/servo,szeged/servo,jimberlage/servo,dsandeephegde/servo,avadacatavra/servo,paulrouget/servo,jimberlage/servo,nnethercote/servo,CJ8664/servo,anthgur/servo,larsbergstrom/servo,sadmansk/servo,pyfisch/servo,larsbergstrom/servo,mattnenterprise/servo,anthgur/servo,peterjoel/servo,sadmansk/servo,dsandeephegde/servo,jimberlage/servo,eddyb/servo,mattnenterprise/servo,jimberlage/servo,emilio/servo,saneyuki/servo,avadacatavra/servo,szeged/servo,paulrouget/servo,dati91/servo,larsbergstrom/servo,fiji-flo/servo,mattnenterprise/servo,dsandeephegde/servo,fiji-flo/servo,peterjoel/servo,saneyuki/servo,nnethercote/servo,anthgur/servo,thiagopnts/servo,KiChjang/servo,cbrewster/servo,dati91/servo,saneyuki/servo,splav/servo,notriddle/servo,canaltinova/servo,DominoTree/servo,SimonSapin/servo,canaltinova/servo,mbrubeck/servo,upsuper/servo,SimonSapin/servo,upsuper/servo,eddyb/servo,fiji-flo/servo,KiChjang/servo,DominoTree/servo,KiChjang/servo,paulrouget/servo,cbrewster/servo,peterjoel/servo,emilio/servo,saneyuki/servo,peterjoel/servo,emilio/servo,DominoTree/servo,emilio/servo,szeged/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,rnestler/servo,emilio/servo,pyfisch/servo,CJ8664/servo,peterjoel/servo,saneyuki/servo,dati91/servo,mbrubeck/servo,thiagopnts/servo,saneyuki/servo,jimberlage/servo,sadmansk/servo,SimonSapin/servo,CJ8664/servo,dsandeephegde/servo,pyfisch/servo,eddyb/servo,rnestler/servo,larsbergstrom/servo,CJ8664/servo