Change the default for isolate.py commands run & remap to copy files.
It previously tried to hardlink first, then fall back to copy.
The problem with hardlinks is it really messes up the source tree. Then
incremental builds can fail because the files are left in a read only state.
Sadly there is a significant performance cost. Note that this do not affect
run_isolated.py at all, since it keeps its own private cache.
R=vadimsh@chromium.org
BUG=
Review URL: https://codereview.appspot.com/52800043
1 file changed
