ash: reduce code differences from upstream

ash: reduce code differences from upstream

Upstream commit:

    Date: Wed, 8 Sep 2010 16:21:52 +0800
    [JOBS] Debug compile fix

    No point in tracing a no longer undeclared "ps->cmd", fixes:
    jobs.c: In function \u2018commandtext\u2019:
    jobs.c:1192: error: \u2018ps\u2019 undeclared (first use in this function)
    jobs.c:1192: error: (Each undeclared identifier is reported only once
    jobs.c:1192: error: for each function it appears in.)

    Signed-off-by: maximilian attems <max@stro.at>
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>