scripts/lib/create-production-venv: Avoid shelling out for ln.
scripts/lib/create-production-venv: Avoid shelling out for ln.

Signed-off-by: Anders Kaseorg <087231934ba8fcf78bc142ce37d193b895ac03c4@mit.edu>

synicalsyntax/zulip,eeshangarg/zulip,rishig/zulip,shubhamdhama/zulip,punchagan/zulip,zulip/zulip,kou/zulip,jackrzhang/zulip,hackerkid/zulip,brainwane/zulip,rht/zulip,brainwane/zulip,brainwane/zulip,rishig/zulip,hackerkid/zulip,jackrzhang/zulip,tommyip/zulip,brainwane/zulip,dhcrzf/zulip,rishig/zulip,andersk/zulip,timabbott/zulip,synicalsyntax/zulip,eeshangarg/zulip,punchagan/zulip,kou/zulip,rishig/zulip,brainwane/zulip,hackerkid/zulip,kou/zulip,jackrzhang/zulip,rht/zulip,eeshangarg/zulip,rht/zulip,tommyip/zulip,brainwane/zulip,rht/zulip,dhcrzf/zulip,synicalsyntax/zulip,dhcrzf/zulip,andersk/zulip,kou/zulip,dhcrzf/zulip,synicalsyntax/zulip,kou/zulip,timabbott/zulip,rht/zulip,showell/zulip,dhcrzf/zulip,hackerkid/zulip,timabbott/zulip,andersk/zulip,shubhamdhama/zulip,jackrzhang/zulip,zulip/zulip,andersk/zulip,punchagan/zulip,zulip/zulip,rht/zulip,shubhamdhama/zulip,timabbott/zulip,eeshangarg/zulip,showell/zulip,zulip/zulip,tommyip/zulip,tommyip/zulip,punchagan/zulip,tommyip/zulip,andersk/zulip,eeshangarg/zulip,punchagan/zulip,jackrzhang/zulip,showell/zulip,zulip/zulip,showell/zulip,showell/zulip,hackerkid/zulip,eeshangarg/zulip,tommyip/zulip,rht/zulip,tommyip/zulip,rishig/zulip,dhcrzf/zulip,brainwane/zulip,synicalsyntax/zulip,timabbott/zulip,kou/zulip,jackrzhang/zulip,zulip/zulip,rishig/zulip,synicalsyntax/zulip,rishig/zulip,jackrzhang/zulip,eeshangarg/zulip,shubhamdhama/zulip,showell/zulip,shubhamdhama/zulip,timabbott/zulip,andersk/zulip,punchagan/zulip,shubhamdhama/zulip,punchagan/zulip,kou/zulip,hackerkid/zulip,shubhamdhama/zulip,timabbott/zulip,showell/zulip,zulip/zulip,andersk/zulip,synicalsyntax/zulip,dhcrzf/zulip,hackerkid/zulip