Change build directory from `builds` to `build`
Change build directory from `builds` to `build`

fix bug 1063155

KaiRo-at/socorro,Tchanders/socorro,lonnen/socorro,linearregression/socorro,yglazko/socorro,cliqz/socorro,Tayamarn/socorro,luser/socorro,yglazko/socorro,yglazko/socorro,cliqz/socorro,AdrianGaudebert/socorro,yglazko/socorro,twobraids/socorro,Tayamarn/socorro,pcabido/socorro,m8ttyB/socorro,linearregression/socorro,mozilla/socorro,rhelmer/socorro,Tchanders/socorro,adngdb/socorro,Tchanders/socorro,luser/socorro,KaiRo-at/socorro,luser/socorro,m8ttyB/socorro,Serg09/socorro,lonnen/socorro,rhelmer/socorro,mozilla/socorro,linearregression/socorro,spthaolt/socorro,rhelmer/socorro,mozilla/socorro,Serg09/socorro,Tchanders/socorro,twobraids/socorro,Serg09/socorro,Serg09/socorro,Serg09/socorro,luser/socorro,m8ttyB/socorro,adngdb/socorro,AdrianGaudebert/socorro,AdrianGaudebert/socorro,Tayamarn/socorro,KaiRo-at/socorro,m8ttyB/socorro,adngdb/socorro,spthaolt/socorro,AdrianGaudebert/socorro,m8ttyB/socorro,adngdb/socorro,Tayamarn/socorro,rhelmer/socorro,Tayamarn/socorro,pcabido/socorro,Tayamarn/socorro,yglazko/socorro,AdrianGaudebert/socorro,pcabido/socorro,rhelmer/socorro,KaiRo-at/socorro,twobraids/socorro,spthaolt/socorro,Tchanders/socorro,twobraids/socorro,rhelmer/socorro,adngdb/socorro,adngdb/socorro,KaiRo-at/socorro,linearregression/socorro,KaiRo-at/socorro,mozilla/socorro,lonnen/socorro,linearregression/socorro,Tchanders/socorro,twobraids/socorro,yglazko/socorro,mozilla/socorro,m8ttyB/socorro,pcabido/socorro,cliqz/socorro,luser/socorro,spthaolt/socorro,spthaolt/socorro,twobraids/socorro,cliqz/socorro,luser/socorro,Serg09/socorro,cliqz/socorro,pcabido/socorro,spthaolt/socorro,pcabido/socorro,cliqz/socorro,AdrianGaudebert/socorro,mozilla/socorro,lonnen/socorro,linearregression/socorro