[PATCH wayland-web] Updated build instructions

[Bryce Harrington]

On Wed, Oct 29, 2014 at 04:10:22PM -0700, Bill Spitzak wrote:
> Based on Jon A. Cruz patch. I tested the build on my 12.04 and Linux Mint
> machines and it appears to be correct, though there are certainly no
> guarantees as the machines were not cleaned of all installed packages.

LGTM,
Reviewed-by: Bryce Harrington <b.harrington at samsung.com>