Add getattr access on tmpfs_zygote files for webview_zygote.

webview_zygote inherits tmpfs files from zygote and needs to stat
them after fork.

Bug: 138851227
Test: run walleye_jitzygote config, fork webview_zygote.
Change-Id: I092b942c0426f3f5731536ae9f2f5886a9196d3d
1 file changed