Don't use echo -e in run_tests.sh

[Jon Loeliger]

> In one section, the run_tests script attempts to use the -e (interpret
> escapes) option to echo.  This option is not portable - for example
> the echo built into dash, now the default /bin/sh on several
> distributions does not support it and will just echo "-e" literally.
> 
> Since we don't actually use any of the escapes that -e enables, this
> patch simply removes it.
> 
> Signed-off-by: David Gibson <david at gibson.dropbear.id.au>

Applied.

jdl