Fix jbuilder exec from sub dirs & utop#339

Merged

bobot merged 2 commits intoocaml:masterfrom rgrinberg:fix-jbuilder-exec-utop

Dec 1, 2017

+20-14

Commits on Nov 25, 2017

Restore cwd before execve

jeremiedimino
authored and
rgrinberg
committed
Use absolute paths for lib paths in utop
rgrinberg
committed