preserve ASAN_OPTIONS in eden daemon

Summary:
Update the Eden CLI to preserve the `ASAN_OPTIONS` environment variable when
starting edenfs.

Reviewed By: wez

Differential Revision: D7440148

fbshipit-source-id: c9932c5c14b5a2e040309268f95229c04715bb28

eden/cli/config.py

@@ -640,6 +640,7 @@ Do you want to run `eden mount %s` instead?''' % (path, path))
             'HOME',
             'EMAIL',
             'NAME',
+            'ASAN_OPTIONS',
             # When we import data from mercurial, the remotefilelog extension
             # may need to SSH to a remote mercurial server to get the file
             # contents.  Preserve SSH environment variables needed to do this.