Cherry-pick https://codereview.chromium.org/137433002 from upstream

This fixes the build with a cross compiler toolchain.
We do not require the functionality of this script but
gyp tries to run it and fails if the specified file
does not exist.

As the upstream issue mentions, this script is "going
away soonish", until then we can keep this patch around.

Change-Id: Ib9084103cd95aad3c48541e13351ebee2c9279ea
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>