compiler: disable escape analysis for runtime

Currently the runtime is hard-coded to non-escape in various places.
Don't run escape analysis for runtime.

Change-Id: I002f388320b346380dd232e8e5ac6210794ca35f
Reviewed-on: https://go-review.googlesource.com/76210
Reviewed-by: Ian Lance Taylor <iant@golang.org>
1 file changed