icecc: Remove output on stderr when calling which

The icecc class often uses 'which' for determining paths. This leads
to many messages on stderr in case 'which' doesn't find the
executable. Redirecting stderr to /dev/null inhibits these messages as
the result is handled correctly anyway.

Signed-off-by: Tobias Henkel <tobias.henkel@bmw-carit.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
santiy.bbclass: Add testfile info to error messages (more verbose)

Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
shadow-native: allow for setting password in clear text

Allow user to set password in clear text. This is convenient when
we're building out an image.

This feature is mainly used by useradd.bbclass and extrausers.bbclass.

This patch adds a new option '-P' to useradd, usermod, groupadd and groupmod
commands provided by shadow-native. The shadow package on target and in SDK
will not be affected.

[YOCTO #5365]

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>