ext-sdk-prepare.py: use quiet mode when preparing sysroot
In order to have a shared sysroot usable within the eSDK after recipe
specific sysroots were implemented, we need to run
bitbake build-sysroots as a separate call. However, unlike the first
call, --quiet wasn't being specified and that somewhat undermined the
earlier effort to clean up the eSDK installation output. Make this
second call quiet as well so that the output is tidier.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
