Remove bashism from scripts/prepare_build.sh
Remove bashism from scripts/prepare_build.sh

openwide-java/gitlabhq,stoplightio/gitlabhq,dplarson/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,jirutka/gitlabhq,LUMC/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,t-zuehlsdorff/gitlabhq,iiet/iiet-git,dplarson/gitlabhq,htve/GitlabForChinese,dplarson/gitlabhq,htve/GitlabForChinese,darkrasid/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,axilleas/gitlabhq,iiet/iiet-git,darkrasid/gitlabhq,jirutka/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,openwide-java/gitlabhq,darkrasid/gitlabhq,jirutka/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,axilleas/gitlabhq,t-zuehlsdorff/gitlabhq,dplarson/gitlabhq,jirutka/gitlabhq,t-zuehlsdorff/gitlabhq,t-zuehlsdorff/gitlabhq,htve/GitlabForChinese,darkrasid/gitlabhq,LUMC/gitlabhq,stoplightio/gitlabhq,LUMC/gitlabhq,openwide-java/gitlabhq,htve/GitlabForChinese,iiet/iiet-git,iiet/iiet-git,openwide-java/gitlabhq,LUMC/gitlabhq,dreampet/gitlab