ppc64/crtools.c: use pr_perror()
ppc64/crtools.c: use pr_perror()

In places where we have errno value set, such as after calling ptrace(),
it makes sense to use pr_perror as it appends the errno string. This
also fixes missing '\n' at the end (as pr_perror() adds it).

In places where we keep using pr_err(), don't forget to have '\n'.

Cc: Laurent Dufour <a59ffce977ae3d39bdc87f81ff88b229ad58db88@linux.vnet.ibm.com>
Signed-off-by: Kir Kolyshkin <c0159612b0ef32139322233232df1a0d189c4b9b@openvz.org>
Reviewed-by: Laurent Dufour <a59ffce977ae3d39bdc87f81ff88b229ad58db88@linux.vnet.ibm.com>
Acked-by: Andrew Vagin <74c05afa918858348d6db8037d82fa8124870113@odin.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

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