22248-4-build.sh-posix-permissions
22248-4-build.sh-posix-permissions

Commit ed77e23 removed the executable flag from 4-build.sh, i.e. it
should have posix permission 775, but currently has 664.

Add executable permission to 4-build.sh

estebanlm/pharo,estebanlm/pharo,estebanlm/pharo