Clean build scripts to always use --out-dir option
Right now there are three options used in different build scripts: --out-dir, --build-out and --build-dir. These produce unpredictable behavior when one script call another and pass wrong options there (for example, second script expect --build-out, but --out-dir passed instead). To avoid such problems, each build script must use just one option to specify out directory. The most correct name for such option is --out-dir, as I believe.